— Look! It _____________ again.—Yes. This is the third rain we ____________ this month.
We walked as fast as we could,____ to catch the 9:30 train.
-- I saw Mr Li at the meeting yesterday.--- Did you? He ______ have attended, for he had asked for sick leave.
. Tom said he had been working for three hours, ________, evidently, was untrue.
. He wasted a lot of time playing football, otherwise he ________the exam.
Don’t you think necessary to make a plan before you start doing it?