It's said that this kind of plant only gives off this strange perfume on ________ conditions which the scientists are trying to figure out now. 

试卷相关题目

• 1You are supposed to collect the mistakes you have made. You will make the same mistakes ______.

  A.also

  B.either

  C.otherwise

  D.though

  开始考试点击查看答案
• 2He looked around and caught a man __________ his hand into the pocket of a passenger.

  A.put

  B.to be putting

  C.putting

  D.to put

  开始考试点击查看答案
• 3--Do you know when the Chinese custom_________ from? --It's hard to say. But its characteristics__________ the Tang Period.

  A.began; prove

  B.started; show

  C.dates; suggest

  D.is; appear

  开始考试点击查看答案
• 4You needn't have apologized for your absence_______, it' s hardly your fault.

  A.besides

  B.therefore

  C.however

  D.meanwhile

  开始考试点击查看答案
• 5I think this software is of little use to your work. It is really a ________ of money.

  A.lack

  B.load

  C.question

  D.waste

  开始考试点击查看答案
• 6Because the head-teacher had some important guests to meet, the meeting only _______a few minutes.

  A.kept

  B.continued

  C.lasted

  D.covered

  开始考试点击查看答案
• 7The gym is a public place, so you should be ________ and leave all the machines clean after using them.

  A.considerate

  B.cautious

  C.subtle

  D.modest

  开始考试点击查看答案
• 8Some modem paintings are _____ my understanding;  I simply can't understand what the   painters really want to tell us.

  A.within

  B.behind

  C.around

  D.beyond

  开始考试点击查看答案
• 9The ability to _____ one another for past wrongs is one of the greatest attributes that anyone should possess or exercise. 

  A.explain

  B.forgive

  C.excuse

  D.apologize

  开始考试点击查看答案
• 10— Tell me your secret.   — I ______. It wouldn't be a secret if I told you.

  A.won't

  B.needn't

  C.mightn't

  D.couldn't

  开始考试点击查看答案