1）believe
A.People thought that the Earth was flat this____continued at least the 14th century.
B.I didn't enjoy the film because I didn't think the characters were_______
2)mystery
A.It's one of the greatest______of the natural world.
B.For some_____reason,she left last week without saying dood-bye to anyone.
3)mix
A.Oil doesn't______with water.
B.You can use water or milk,or a______of both.
4)responsible
A.He is_____for taking care of his younger brother while his parents are away.
B.Her father is ill,and she has the_______of caring for him.
5)triangle
A.The play is performed on a_________stage.
B.The pigeons had arranged themselves in a___
6)explode
A.Be careful with fireworks;they can_____in your face.
B.The force of the________broke all the windows of the houses near the car.
7)intelligent
A.Examinations are not necessarily the best way to measure_________.
B.You have to be very_________to go to Oxford University.
8)discover
A.The________of X-rays changed the history of medicine.
B.When she got to her door,she________she had lost her key.
9)science
A.We need more funding for________research.
B.Space travel is one the wonders of modern___.
10)appear
A.The singer's________on the stage caused everyone to applaud.
B."Where's Tom?""I don't know-he's________."
C.The__________of the key is still a mystery.

1）Her singing lessons resulted______her getting a part in a musical.
2)As soon as I was________board,I began to have second thorghts about leaving.
3)These magazines are produced_______vast numbers.
4)He tore the letter_______small pieces and threw them in the dustbin.
5)It's a simple dish to prepare,consisting mainly_______rice and vegetables.
6)I can give you an explanation________why I'm late.
7)Her bike has never been used and is______perfect condition.
8)What do you think has happened_________Julie?She should have been here an hour ago.
9)The pilot turned the plane into the wind to take_________.
10)A one-day course for beginners will be held_______May 14.

1）believe
A.People thought that the Earth was flat this_belief___continued at least the 14th century.
B.I didn't enjoy the film because I didn't think the characters were__unbelievable_____
2)mystery
A.It's one of the greatest_mysteries_____of the natural world.
B.For some_mysterious____reason,she left last week without saying dood-bye to anyone.
3)mix
A.Oil doesn't__mix____with water.
B.You can use water or milk,or a__mixture____of both.
4)responsible
A.He is_responsible ____for taking care of his younger brother while his parents are away.
B.Her father is ill,and she has the__reponsibility_____of caring for him.
5)triangle
A.The play is performed on a___triangular______stage.
B.The pigeons had arranged themselves in a__triangle _
6)explode
A.Be careful with fireworks;they can_explode ____in your face.
B.The force of the__explosion______broke all the windows of the houses near the car.
7)intelligent
A.Examinations are not necessarily the best way to measure__intelligence_______.
B.You have to be very___intelligent ______to go to Oxford University.
8)discover
A.The__discovery______of X-rays changed the history of medicine.
B.When she got to her door,she__discovered______she had lost her key.
9)science
A.We need more funding for__scientific______research.
B.Space travel is one the wonders of modern_science__.
10)appear
A.The singer's__appearence______on the stage caused everyone to applaud.
B."Where's Tom?""I don't know-he's__disappeared____."
C.The_disappearence_________of the key is still a mystery.

1）Her singing lessons resulted__in____her getting a part in a musical.
2)As soon as I was___on_____board,I began to have second thorghts about leaving.
3)These magazines are produced__in_____vast numbers.
4)He tore the letter_into______small pieces and threw them in the dustbin.
5)It's a simple dish to prepare,consisting mainly__of_____rice and vegetables.
6)I can give you an explanation___for_____why I'm late.
7)Her bike has never been used and is___in___perfect condition.
8)What do you think has happened__to_______Julie?She should have been here an hour ago.
9)The pilot turned the plane into the wind to take__off_______.
10)A one-day course for beginners will be held__on_____May 14.
个人见解，仅供参考。