— Has he finished his report yet?
— I’m not sure. He _______ the report these days.
| A．has been writing | B．is writing | C．wrote | D．has written |
16. He made another wonderful discovery, __________ of great importance to science.
| A．I think which is | B．which I think it is | C．which I think it | D．which I think is |
15. Great changes ______ in the city, and a lot of new buildings ______.
| A．have been taken place; have been set up | B．have taken place; have been set up |
| C．have taken place; have set up | D．were taken place; were set up |
14. I thought she ______ like something to eat, so I have bought two pieces of bread.
| A．may | B．might | C．could | D．Must |
13. Recently I bought a house, _______ was very reasonable.
| A．which price | B．whose the price | C．of which price | D．the price of which |
12. The little boy walks ____ he _____ an old man.
A. as if, likes B. as though, were c. even if, likes D. even though, were