The moment _____ Leo will never forget is _____ Mr. Smith gave him a lot of valuable advice on how to improve his writing.
| A．that; that | B．when; that | C．when; / | D．that; when |
If _________ the same treatment again, he is sure to get well.
| A．giving | B．give |
| C．given | D．being given |
—Was his father very strict with him when he was at school?
—Yes. He had never praised him _________ he became one of the top students in his grade.
| A．after | B．unless |
| C．until | D．when |
—I wonder if I could possibly use your car tonight. —_________. I'm not using it anyhow.
| A．Sure, go ahead | B．I don't know |
| C．Yes, indeed | D．I don't care |
He _________ the boy's ignorance and sold him a worthless learning machine.
| A．made advantage of | B．took possession of |
| C．took charge of | D．took advantage of |
Tony can't have received the invitation. _________，he would have attended your birthday party yesterday.
| A．Therefore | B．Otherwise |
| C．However | D．Besides |