1. — Have you known each other for long? — Not very long, ____ we started to work in the company.A. after B. before C. when D. since2. — Did you enjoy yourself at the party? — Sorry to say I didn’t. It was ____ a meeting than a party.A. much of B. more like C. less of D. more or less3. He is rather difficult to make friends with, but his friendship, ____, is more true than any other. A. once gained B. when to gain C. after is gained D. while gaining4. The river, ____ are covered with trees, is very long.A. which banks B. of which banks C. whose the banks D. the banks of which5. ____ it will do us harm or good remains to be seen.A. If B. Whether C. That D. Where6. We should do more such exercises in the future, I think, ____ we did yesterday.A. as B. which C. that D. than7. I am so glad that I have found the same modern computer ____ I am working on.A. which B. as C. that D. where8. ____ method you choose, so long as you finish the job on time. A. It isn’t a matter to me what B. What doesn’t matter is that C. It doesn’t matter to me which D. No matter which9. It was quite a serious mistake, ____caused by carelessness. A. which I think was B. I think which was C. which I think it was D. I think which it was10. The young man went into the cinema and after ____ seemed half an hour he came out.A. that B. it C. what D. which 11. One of the men held the view ____ the book said was right.A. what that B. what C. that D. that what 12. Soon they got to the bank. ____ stood a big pine tree.A. In front of which B. There C. Where D. It13. He was impolite to the Custom Officer, ____, of course, made things even worse.A. who B. that C. ...