1. tom’s mother kept telling him that he should work harder, but ______ didn’t help. a. he b. which c. she d. it 2. tom’s mother kept telling him that he should work harder, ______ didn’t help. a. he b. which c. she d. it 3. we had to be patient because it _____ some time _____ we got the full results. a. has been ； since b. had been ； until c. was； after d. would be ； before
