.It rained a lot during their journey, so they________have had a good time.A can’t B must C shouldn’t D might
Mr. Smith,________of the ________speech,started to read a novel.
It was not until the teacher had explained it three times _______ how to work out the problem.
Only after my friend came ____.
Dickson left his father’s firm and ____business on his own.
There is no doubt _______international cooperation is the key to dealing with cyber crime.