—Did you have any difficulty catching yesterday’s lecture?
—No. The professor spoke very clearly to make his speech easy _____.
| A．understood | B．understanding | C．to be understood | D．to understand |
Research shows that teenagers ________ talk about their day with family members at the dinner table are less likely to engage in high-risk behavior.
| A．what | B．who | C．whom | D．\ |
Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.
| A．when | B．while | C．after | D．before |
It’s said that the heaviest man in this city, _________ 1,345 pounds, has been sent to hospital to receive medical treatment.
| A．weighing | B．to weigh | C．weighed | D．weigh |
Tom’s teacher and classmates all knew Tom would not do well, but he succeeded _________ their expectations.
| A．below | B．by | C．in | D．beyond |
Not until he failed in the last examination _________ he should have spent more time on study.
| A．did he realize | B．he realized | C．did he not realize | D．he didn’t realize |