I want to buy two ___ of colour ___.
| A．boxs…chalks | B．boxs…chalk | C．boxes…chalks | D．boxes…chalk |
When he was a boy, he used to go there and watched _______.
| A．repairing bicycles | B．to repair bicycles |
| C．bicycles being repaired | D．bicycles to be repaired |
Robert is said______ abroad, but I do not know what country he studied in.
| A．to have studied | B．to study | C．to be studying | D．to have been studying |
Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
| A．and it was | B．as | C．that | D．which |
He______ on this paper for ten minutes but he______only about sixty words.
| A．will have worked, has written | B．worked, has written |
| C．has been working, has written | D．will be working, works |
Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.
| A．has written | B．wrote | C．had written | D．was writing |