问题: 英语
1.I forget what I was taught,I only remember what I ______.
A.learn B.learned C.have learned D.had learned
2.--Where _____ my pen?I can't find it anywhere.
--I ____ it on this table,but now ,it's gone.
A.did you put;have put B.have you put;put
C.had you put;was putting
D.were you putting;have put
3.They ____ friends since they met in New York.
A.have mad B.have become C.have been
D.have turn
请告诉我解题思路，过程
谢谢
解答:
They ____ friends since they met in New York.
A.have mad
make friends 交朋友
I forget what I was taught,I only remember what I ______.
C.have learned
已经掌握的，对应remember的现在时
.--Where _____ my pen?I can't find it anywhere.
--I ____ it on this table,but now ,it's gone.
A.did you put;have put
一般疑问句，did you put
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