I shall tell you what he _____ at three o'clock yesterday afternoon.
A.had done
B.would do
C.was doing
D.had been done

单项选择题The teacher suggested that each student _____ a plan for the vacation.A.madeB.makeC.makesD.will make

单项选择题I have not found my book yet; in fact, I am sure _____ I could have done with it.A.whetherB.whereC.whenD.what