Mr. Smith is quite generous and warm-hearted, a person______ you can turn when having trouble.
| A．for whom | B．with whom | C．to whom | D．of whom |
—How long _______ in Shanghai?
—I will be there attending a conference and giving a speech, which will take about 3 days.
| A．have you stayed | B．are you staying | C．do you stay | D．did you stay |
If he _______ the opportunity at that time, he would be the new department manager now.
| A．seized | B．should seize | C．has seized | D．had seized |
To everyone’s amazement now, technology ________ faster than most people can keep pace with.
| A．is changing | B．will change | C．changes | D．has changed |
It was not until the early 1950s ______most tape recorders began using plastic tape as they do today.
| A．when | B．which | C．that | D．Before |
There is an old saying _______ goes “Give a man a fish, and you feed him for a day. Teach a man to fish, and he can feed his belly the whole life”.
| A．that | B．who | C．when | D．As |