_____the beginning of the 19 th century did scientists know that all matter is made up of atoms.

试卷相关题目

• 1If _______, these injuries can develop into more serious problems.

  A.left untreating

  B.left untreated

  C.leaving untreated

  D.are left untreated

  开始考试点击查看答案
• 2What would have happened, ________ as far as the river bank?

  A.Bob had walked farther

  B.if Bob should walk farther

  C.if Bob walked farther

  D.had Bob walked farther

  开始考试点击查看答案
• 3So sleepy_______ that he could hardly keep his eyes______.

  A.John was; open

  B.was John; open

  C.John was; opened

  D.was John; opened

  开始考试点击查看答案
• 4It was many years ____ American women were given the rights to vote.

  A.when

  B.since

  C.before

  D.as

  开始考试点击查看答案
• 5Not until he had left his friend _______ how important friendship was for him.

  A.did he realize

  B.he realized

  C.had he realized

  D.he had realized

  开始考试点击查看答案
• 6______ with the size of the whole earth, the highest mountain does not seem high at all.

  A.When compared　 　　

  B.While comparing

  C.Compare

  D.Comparing

  开始考试点击查看答案
• 7___________ that I want to eat another two.

  A.Such delicious cakes are they

  B.So delicious they are cakes

  C.Such delicious cakes they are

  D.So delicious cakes they are

  开始考试点击查看答案
• 8He was unable to make such progress, __________ .

  A.as he tried hard

  B.as hard he tried

  C.so hard did he try

  D.hard as he tried

  开始考试点击查看答案
• 9Only after Helen moved to Australia ______ how important she was to me .

  A.I had realized

  B.had I realized

  C.I did realize

  D.did I realize

  开始考试点击查看答案
• 10----Did you get what the teacher said? ----No. So softly _____ that I could hardly hear her.

  A.spoke she

  B.she spoke

  C.did she speak

  D.she did speak

  开始考试点击查看答案