题目内容
—I wonder how much you charge for your services.
—The first two are free ________ the third costs $30.
| A．while | B．until |
| C．when | D．before |
A
解析
—Haven’t seen Lucy recently，what’s happened?
—Oh，it’s more than two months ________ she worked here.
| A．which | B．that |
| C．before | D．since |
________ my teacher didn't tell me directly, I still felt that I didn't live up to her expectation.
| A．When | B．Since |
| C．As | D．While |
________ you have to do the job, you should try your best to do it well even though it may be very difficult for you.
| A．Since | B．While |
| C．Unless | D．Though |
Steve was busy clearing the cups and dishes from the table ________ others were playing.
| A．until | B．if |
| C．since | D．while |
Scientists are warning that ________ emissions of carbon (碳排放) are cut, we could be heading for an environmental disaster.
| A．before | B．as |
| C．unless | D．in case |
—Well, Jane has many advantages, too.
—Oh, yes. ________ others are weak, she is strong.
| A．If | B．Where |
| C．Though | D．When |
Mobile phone users have developed a series of symbols, such as and to show ________ they feel.
| A．which | B．when |
| C．how | D．why |
—Have you got any idea for the summer vacation?
—I don't mind where we go ________ there's sun，sea and beach.
| A．as if | B．as long as |
| C．now that | D．in order that |