---Look! The clouds are gathering.
---Yes. I’m afraid it be pouring down soon.
| A．can | B．must | C．should | D．might |
To my amazement, that man ______ the flood and afterwards he became rich. But he ______ his wife and children and lived abroad.
| A．survived; deserted | B．survived from; deserts |
| C．was survived; would desert | D．has survived; deserted by |
Some aspects(方面) of a teacher’s job ______ be tiring, and teachers often ______ work at inconvenient hours.
| A．can; must | B．may; can | C．can; have to | D．have to; must |
My friend, Tom, may have missed taking the flight to Africa, ______ he can’t arrive for another hour.
| A．in which case | B．in that case | C．in case | D．in any case |
The sports meeting, due to ______ this weekend, has been put off due to the rain these days.
| A．being held | B．holding | C．hold | D．be held |
Researches are convinced ______ the positive effect of laughter ______ physical and mental health.
| A．of; at | B．by; in | C．of; on | D．at; on |