It was in the school _____ he had studied ______he began the important experiment.
A that ,where B in which, which C where, that D where , in which
A lot of lovers chose to get married on Dec. 12, 2012, ________ the date, the month and the year match.
| A．that | B．on which |
| C．in which | D．which |
I felt surprised that anyone of his intelligence ________ such an easy test.
| A．might have failed | B．could have failed |
| C．should have failed | D．must have failed |
We ________ take clean drinking water for granted. One day we may run out of it.
| A．needn't | B．can't |
| C．won't | D．shouldn't |
Parents are doing all they ________ to help their children achieve their ambitions.
| A．shall | B．can |
| C．may | D．need |
________ for the fact that she broke her leg, she might have passed the exam.
| A．Hadn't it been | B．Had it not been |
| C．Was it not | D．Were it not |