—I can’t move the bookcase． Could you give me a hand?
—_____．
| A．With pleasure | B．It’s my pleasure |
| C．Not at all | D．Never mind |
—How long do you think it will be______man can finally solve the problem of cancer?
—Well，it depends
| A．when | B．until | C．after | D．before |
______ is known to us is that tobacco contains nicotine and other harmful products, so you should give up smoking.
| A．As | B．It | C．What | D．Which |
This book is considered to be the best novel of its kind ever.
| A．to write | B．writing | C．having written | D．written |
-- I can’t find my umbrella.
-- I saw George going away with____, but I’m not sure whether it is yours.
| A．it | B．that | C．one | D．the one |
I can't _him in the knowledge of wild plants．As a matter of fact, he' s an expert．
| A．match | B．win | C．compare | D．defeat |