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 |
—I think it is going to be a big problem.
—Yes，it could be.
—I wonder__________we can do about it.
| A．if | B．how | C．what | D．that |
In the after-class activities，the students had plenty of_________ and gained a lot of practical _________.
| A．exercises;experiences |
| B．practices;experience |
| C．practice;experience |
| D．exercise;experiences |
She is American，__________she knows little about American history.
| A．so | B．yet | C．and | D．therefore |
The science of medicine，__________progress has been very rapid lately，is perhaps the most important of all the sciences.
| A．to which | B．in which |
| C．which | D．with which |
Information has been put forward__________more middle school graduates will be admitted into universities.
| A．while | B．that | C．when | D．as |