【2015·陕西】—Sir, could I hand in my homework a bit late?—_____, since you’ve been unwell these days.
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?