The population of China is much large than ______
this B.those C.it D.that
There are so many tall trees in the forest, ______ .
| A．some of them measures 50 metres |
| B．some of which measuring 50 metres |
| C．some of them measuring 50 metres |
| D．some of which measures 50 metres |
The teacher, together with the students ____________ reading Writing Skills that _______ newly published in America.
| A．are; were | B．is; were |
| C．are; was | D．is; was |
Only after my friend came______.
| A．did the computer repair |
| B．he repaired the computer |
| C．was the computer repaired |
| D．the computer was repaired |
Though difficult, I ________ him find a job, which made him very pleased.
| A．tried to help | B．managed to help |
| C．tried helping | D．succeeded to help |
We are faced with the problem _________ we should do with so much pollution.
| A．what | B．why | C．that | D．That |