–Can you come?
–You go first and I’ll ____ in a few minutes.
| A．join you | B．join in you |
| C．join up you | D．join to you |
It is _________ to increase input in areas of innovation to ensure the country's promising prospect.
| A．accessible | B．essential |
| C．alternative | D．commercial |
— 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 |