Most whales must come up for air after several minutes, _______ a few can stay u
题型：不详难度：来源：
| Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more. |
答案
| A |
解析
| 考查连词;A. while 当…时候，虽然，然而，B. or否则，C. for因为，D. so 因此，句意是;大多数鲸鱼几分钟后要浮出水面呼吸，但还有些可以在水下呆一个小时或更多。选Ａ。 |
举一反三
| Parents should pay attention to areas _______ their child is having difficulty and spend extra time to help him or her master those skills. |
All I’m hoping for is _______ wherever Michael is he will come home safe and sound.| A．whether | B．which | C．that | D．what |
|
Wang Ping was so angry he heard his friend betrayed him he tore the letter into two immediately.| A．that；when | B．that；that | C．when；what | D．when；that |
|
Just use this room for the time being, and we’ll offer you a larger one
it becomes available.| A．as soon as | B．unless | C．as far as | D．until |
|
| Though he had been trained for three months, he didn’t pass the exam. |
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