My uncle _____ Germany on business many times.
| A．has been on | B．has gone to |
| C．has been to | D．has been in |
He is so poor that he has no house _____.
| A．to live | B．living | C．living in | D．to live in |
The stones are so heavy. How _____ they _____ to the top of the building without modern machines?
| A．do; lift | B．did; lift | C．were; lifted | D．were; lift |
No free plastic bag in the supermarket helps to _____ white pollution.
| A．reduce | B．recycle | C．provide | D．produce |
The young man broke his arm in the accident and had to _____ his job.
| A．give up | B．put up | C．cut up | D．pick up |
We _____ walk in the park after supper, talking about all _____ we were interested in.
| A．used to, what | B．were used to, what | C．used to, that | D．were used to, which |