It is dark outside, so please____ your step while going down the stairs.
| A．see | B．look | C．notice | D．mind |
_____ scores of times, but he still couldn’t understand it.
| A．Having explained | B．Having been explained |
| C．Though it was explained | D．It was explained |
--- He was nearly killed by a car once.
--- Oh. when was________ exactly?
--- It was in 2002 __________ he was riding a bike on the drive-way.
| A．this; that | B．that; when | C．that; that | D．this; when |
The students expect there ______ more reviewing classes before the final exam.
| A．is | B．to be | C．being | D．have been |
______ the secret of nature, the young scientist has little time for entertainment．
| A．Devoted to research | B．Devoted himself to research |
| C．Devoted to researching | D．Devoting to research |
_________ into a famous university made his parents very happy.
| A．Tom was admitted | B．Tom be admitted |
| C．If Tom was admitted | D．Tom’s being admitted |