Don’t call me at three to four o’clock this afternoon. I the patient at that time.
| A．am treating | B．have treated | C．will treat | D．will be treating |
I couldn’t ________ to her. The line was busy.
| A．go by | B．go around | C．get in | D．get through |
It is difficult to ________ one twin from the other. They almost don’t ________ from each other.
| A．differ; distinguish | B．Distinguish; different |
| C．distinguish; differ | D．tell; different |
—I’m sure Andrew will win the first prize in the final.
—I think so. He ________ for it for months.
| A．is preparing | B．was preparing |
| C．had been prepared | D．has been preparing |
It didn’t ________ to me that the naughty boys should have ________ to prove what we discussed the day before.
| A．occur; set out | B．happen; set about |
| C．strike; set off | D．come up; set up |
When asked why he went there, he said he was sent there ________ for a space flight.
| A．training | B．being trained | C．to have trained | D．to be trained |