1 ---- I didn't hear you come in last night.---- That's good.We tried_____ noisy.

1 ---- I didn't hear you come in last night.---- That's good.We tried_____ noisy.
A.not be B.not to be C.to be not D.to not be
2.Because of air pollution being greatly reduced,this city is still ______.
A.a good place which to be lived in B.lived as a good place
C.a good place to live in D.living in as a good place
3.---- Why was the official meeting called?---- _____ new officers.
A.Select B.Selecting C.To select D.For selecting
4.---- Where did he go?---- He went to another store ______.
A.to buy pencils B.for buying pencils C.buy pencils D.buying pencils
5.---- My baby has a heart trouble.---- Did the doctor find it difficult ______
A.in treating B.treating C.for treating D.to treat
选项 原因