Temperatures________ quite dramatically at night in mountains，so put on some warm clothes before going out．
A．are droppedB．drop
C．are being droppedD．have dropped
--Mary，how did your Math test go？
--I had thought I _________，but in fact I came in the top 10 in my class．
A．should have failedB．couldn’t have failed
C．might have failedD．shouldn’t have failed
Though a typhoon is on the way，people are still looking forward _____ the outdoor concert．
A．to cancelingB．not to canceling
C．not to cancelD．to not canceling
--He didn’t feel a bit nervous when ________．
--No．He’d had a lot of time ________ for it after all．
A．interviewing; to prepare
B．interviewed; to prepare
C．interviewing; preparing
D．being interviewed; preparing
I ______ to reach the manager for the last two hours but the line is always busy．
A．triedB．have tried
C．had triedD．have been trying
--How do you usually go to work？
--I usually drive，but if it is fine，I ______ by bike．
A．will goB．would go
C．have goneD．had gone
