______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
A. Although B. As long as C. If only D. As soon as
Either you or one of your students ______ to attend the meeting that is due tomorrow.
A. are B. is C. have D. be
You and I could hardly work together, ?
A. could you B. couldn’t I C. couldn’t we D. could we
Please do me a favor — ______ my friend Mr. Smith to Youth Theater at 7:30 tonight.
A. to invite B. inviting C. invite D. invited
— It’s the office! So you know eating is not allowed here.
— Oh, sorry.
A. must B. will C. may D. need
Nowadays people sometimes separate their waste to make it easier for it .
A. reusing B. reused C. reuses D. to be reused
