—Who has taken my pen away?
—__________. He was here a moment ago.
| A．It must be Li Ping | B．It is Li Ping take |
| C．Li Ping is | D．Li Ping must take |
Try not to cough more than you can _______ since it may cause problems to your lungs.
| A．check | B．allow | C．stop | D．help |
— Why on earth didn’t you answer the door?
— I’m terribly sorry, but the telephone _______, too.
| A．is ringing | B．was ringing | C．rang | D．was about to ring |
Mr. Brown doesn’t feel at _______ease for the time being for _______ little money the present job brings him can hardly support his extended family.
| A．/; the | B．an; the | C．an; / | D．the; a |
一I just can’t stop worrying about the result of my medical examination.
一_________. There’s nothing you can do now but wait.
| A．Take your time | B．Watch out for it | C．Just a moment | D．Sit back and relax |
Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
| A．who | B．where | C．which | D．of which |