Not for a moment ______ that this disease was caused by certain virus.
| A．he have doubted | B．he doubts | C．did he doubt | D．he did doubt |
It was really _____ of your brother not to play the guitar while you were preparing your lessons.
| A．modest | B．outspoken | C．considerate | D．determined |
He made a mistake, but then he corrected the situation _it got worse.
| A．until | B．when | C．before | D．as |
E-mail, as well as telephones, ____an important part in daily communication.
| A．is playing | B．have played | C．are playing | D．play |
______ on the top of the tower, and you can see the whole city.
| A．Standing | B．To stand | C．Stood | D．Stand |
—A naughty boy kept talking in class.
—Are you _____ Mike? It’s just like him to be so rude!
| A．coming across | B．looking down on | C．looking forward to | D．referring to |