选择填空 （）1.There is no difference between the two words . I re

选择填空 （）1.There is no difference between the two words . I really don’t know（）
（A）选择填空
（）1.There is no difference between the two words . I really don’t know（）
A.what to choose B.which to choose C.to choose which
（）2.Excuse me . Would you please tell me （）buy a digital camera ?
A.what to B.where to C.where can I
（）3.The worker is teaching us （）mend the chair .
A.how to B.what to C.when to
（）4.--- Why didn’t you start ? Others have gone swimming .
- ---- No one told me（）
A.when to B.how to start C.when will start
（）5.I don’t know （）to join an English club or not .
A.if B.whether C.unless
（）6.No one can tell me （）next .
A.what to do it B.how do it C.what to do