If you go into a store and feel that the clerk is being rude, stop and think that she____ a tough day, and put yourself in her shoes.
| A．may have | B．may have had | C．must have | D．should have had |
— May I ask for two days off tomorrow?
—______． You know, the National Day holiday is just around the corner and every salesgirl is as busy as a bee．
| A．It’s out of the question | B．No problem |
| C．None of my business | D．I don’t care |
It was nine years ago, ________ I went to the UK for the first time, ________ I began to learn English.
| A．that; where | B．when; that |
| C．that; when | D．when; which |
That old man ________to be more than a hundred years old, but he looked much younger than most of the ninety-year-olds.
| A．expressed | B．explained |
| C．stated | D．claimed |
Something must be done to stop cutting down trees. ________ all the trees are cut down, the valuable soil will be washed away by the heavy rain.
| A．Whether | B．Unless |
| C．Once | D．Until |
Mr. Black, as far as I know, is said _______ a book on the history of the Ming Dynasty, which turns out to be a bestseller.
| A．to write | B．to have written |
| C．to be writing | D．having written |