Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.

A. since
B. after
C. before
D. when
相關習題

科目:高中英語 來源: 題型:單選題

Scientists say it may be five or six years ________ it is possible to test this medicine on human patients.


  1. A.
    since
  2. B.
    after
  3. C.
    before
  4. D.
    when

查看答案和解析>>

科目:高中英語 來源: 題型:

Scientists say it may be five or six years _______ it is possible to test this medicine on human patients.

A. since B. after?

C. before D. when?

查看答案和解析>>

科目:高中英語 來源: 題型:

Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.

       A.since B.a(chǎn)fter  C.before      D.when      

查看答案和解析>>

科目:高中英語 來源: 題型:

Scientists say it may be five or six years __________it is possible to test this medicine on human patients.

A.since                  B.after                  C.before                D.when

查看答案和解析>>

科目:高中英語 來源:2011-2012學年福建省廈門市五顯中學高一上學期期中考試英語試卷(帶解析) 題型:單選題

Scientists say it may be five or six years_______it is possible to test this medicine on human patients.

A.whenB.a(chǎn)fterC.beforeD.since

查看答案和解析>>

科目:高中英語 來源:2012-2013學年山東省德州市樂陵一中高一3月月考英語試卷(帶解析) 題型:單選題

Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.

A.sinceB.a(chǎn)fterC.beforeD.when

查看答案和解析>>

科目:高中英語 來源:2012-2013學年遼寧省錦州市錦州中學高一下學期第一次月考英語試卷(帶解析) 題型:單選題

Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.

A.since B.a(chǎn)fter C.before D.when

查看答案和解析>>

科目:高中英語 來源:2013-2014學年湖南省高三9月月考英語試卷(解析版) 題型:單項填空

Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.

A. since                   B. after                   C. before     D. when

 

查看答案和解析>>


同步練習冊答案