1. Bob used to be a lazy boy, but he is __________ doing his homework very seriously tonight.
A. setting out B. preparing for C. going about D. putting on
2. –You _________ here all the way through the thick snow last night. There was nothing important.
--Yes, but I didn’t know.
A. didn’t need to come B. don’t need to come
C. needn’t have come D. needn’t come
