36. The Sahara Desert is a natural ___ that seperates north & Cemral Africa.
A.prevertion B.barricade C.barrier D.base

37. The manworked him sixteen hours a day & heat him ____ .
A.in addition B.in call C.in advance D.in action

38. The elderly people inthis country are entitled to ____ a special heating allowance.
A.clarm B.declare C.inquire D.apply

39. The snow has been steadily ____ for hours & the ground is completely coverd.
A.showering B.dropping C.decending D.falling

40. Everybody seemend to have known about his scandal, only his wife was kept in the ___.
A.dark B.ignorance C.shade D.shadow

41. Our new cars goes ___ clockwork, it's a joy to be in it.
A.like B.for C.to D.as

42. The goverment's action had. no____ on the trade imblance.
A.affect B.afford C.effect D.effort

43. The hostness went to great ___ to make the child comfortable at home.
A.efforts B.lengths C.heights D.details

44. You said the post office is on this black can be ___ abit more ?
A.particular B.specific C.abstract D.especial

45. It can be safely ___ that there is no living beings on that planet.
A.resumed B.assessed C.assumed D.assured

36c，37c，38d，39d，40a，41a，42c，43b，44b，45b