The mother often tells her son to be a good boy, warning him to______ trouble.
| A．hold back from | B．keep out of | C．break away from | D．get rid of |
While visiting the robot exhibition, the professor kept nodding his head to express his _______ with his students’ work.
| A．description | B．congratulation | C．ambition | D．satisfaction |
Who was it _______ wanted to see me just now?
| A．whom | B．that | C．when | D．which |
Do you think the reason _______ he gave is believable?
| A．which | B．why | C．what | D．to which |
_______ his membership card, Tony decided to make a phone call to check whether there was something wrong．
| A．Not having received | B．Not to receive |
| C．Not received | D．Having not received |
It’s years since I _______ him last time, and I haven’t written back to him.
| A．heard of | B．heard out | C．heard about | D．heard from |