________ the past，our life is much better.
| A．Comparing with | B．Be compared |
| C．To compare with | D．Compared with |
Professor White has written some short stories, but he is _________ known for his plays．
| A．the best | B．more | C．better | D．the most |
Ladies and gentlemen, please fasten your seat belts．The plane ________．
| A．takes off | B．is taking off | C．has taken off | D．took off |
．He is always ready to help others, seldom, ______, refusing them when they turn to him．
| A．if never | B．if ever | C．if any | D．if not |
---Excuse me．Can you spare me a few minutes? ---______．
| A．What’s on? | B．What’s up? | C．What’s more? | D．What is it? |
Living in such a high mountain _________be cold．
| A．should | B．can | C．may | D．must |