—Mom, can I go out and play with my friends now?
—No, honey, you can’t _____ you haven’t recovered from the knee injury.
| A．until | B．before | C．as | D．unless |
– I rang you at about ten o’clock, but there was no reply.
– Oh, that was probably ________ I was seeing the doctor.
| A．when | B．why | C．what | D．that |
I feel uncomfortable each time I remember the situation _______Mary didn’t agree with me _________ the matter.
| A．that; at | B．in which; over | C．which; about | D．where; to |
The situation is more _________ than ever. I’m _______about what to do next.
| A．puzzled; puzzled | B．puzzling; puzzling |
| C．puzzling; puzzled | D．puzzled; puzzling |
– Can you tell me ___________?
– An engineer from Jinan Iron and Steel Plants.
| A．what your friend is | B．who your friend is |
| C．what is your friend | D．who is your friend |
It is requested that each of the teachers invited ______ a performance at the. party.
| A．should give | B．will give | C．has to give | D．must give |