Black holes can not be seen directly, so determining the number of them is a___________ task.   

试卷相关题目

• 1The young dancers looked so charming in their beautiful clothes that we took ________ pictures of them.        

  A.many of

  B.masses of

  C.the number of

  D.a large amount of

  开始考试点击查看答案
• 2Although the financial and banking crisis spread all the southeastern Asian countries, the market inChina remained __________  as usual.  

  A.firm

  B.ready

  C.steady

  D.standard

  开始考试点击查看答案
• 3She is not easy to work with,because she is very________in everything,not willing to accept others' opinions even if she is wrong.

  A.absentminded

  B.stubborn

  C.outgoing

  D.confident

  开始考试点击查看答案
• 4It was a really________experience. Afterwards everybody was very________.

  A.frightening;shocking

  B.frightened;shocking

  C.frightening;shocked

  D.frightened;shocked

  开始考试点击查看答案
• 5The population of Africa is __________ so rapidly as to cause concern of the whole world.

  A.expanding

  B.stretching

  C.extending

  D.spreading

  开始考试点击查看答案
• 6Although the situation is getting worse and worse, the girl is still ________ about the final success.     

  A.optimistic

  B.opposite

  C.depressed

  D.gloomy

  开始考试点击查看答案
• 7If you are still____ of your legal rights, you can have a talk with the lawyer.     

  A.certain

  B.sure

  C.uncertain

  D.unknown

  开始考试点击查看答案
• 8After a thorough search，the rescue team finally brought the mountain climbers back，________.

  A.safe and sound

  B.safely and sound

  C.safely and soundly

  D.safe and soundly

  开始考试点击查看答案
• 9She felt________ of doing that and tears ran down her cheeks.     

  A.shame

  B.ashamed

  C.sorry

  D.disappointed

  开始考试点击查看答案
• 10The company is making efforts to encourage its workforce to make the switch to __________ meansof transportation, such as carpooling or biking to reduce air pollution.

  A.alternative

  B.immediate

  C.primitive

  D.systematic

  开始考试点击查看答案