.There are 55 students in Class 5, _______ failed in the test.
| A．all of which | B．all of them |
| C．none of whom | D．none of them |
The number of foreign students attending Chinese universities ______ rising steadily since 1990.
| A．have been | B．are | C．has been | D．is |
.----Look at the dark clouds outside. please take the umbrella with you.
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| A．thanks. Take it easy. | B．OK, just in case | C．well, it just depends | D．go ahead |
We all feel it is Jack as well as his wife that for their son's bad performance at school.
| A．are to blame | B．is to the blamed | C．are to be blamed | D．is to blame |
He always brings me a pretty gift he comes to visit me.
| A．by the time | B．every time when | C．every time | D．at times |
Do remember to be ________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.
| A．cautious | B．thoughtful | C．considerate | D．curious |