Researches are convinced ______ the positive effect of laughter ______ physical and mental health.
| A．of; at | B．by; in | C．of; on | D．at; on |
—Will you attend the meeting this evening?
—But I ________ told anything about it.
| A．wasn’t | B．am not | C．haven’t been | D．won’t be |
—Why weren’t you at the meeting?
—I ________ for a long-distance call from my aunt in America.
| A．waited | B．was waiting | C．had been waiting | D．had waited |
—I’m sorry, but the boss isn’t here yet. Shall I have him call you when he comes back?
—No, I’ll call him back. If I call again in half an hour, do you think she ________ ?
| A．had arrived | B．has arrived | C．will arrive | D．will have arrived |
You’d better not phone the manager between 7 and 8 tomorrow evening; he ________ an important meeting then.
| A．will have | B．would have | C．will be having | D．will have had |
—You could have asked Mr Johnson for help. He is kind-hearted.
—I ________ that. A whole day ________.
| A．forget; wastes | B．forgot; was wasted | C．forgot; had wasted | D．forget; was wasted |