题目内容

10. Only recently_________possible to separate the components of fragrant substances and to determine their chemical composition.

A. it becomes
B. having become
C. has it become
D. which becomes

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9. Only under special circumstances_________to take make-up tests.

A. are freshmen permitted
B. freshmen are permitted
C. permitted are freshmen
D. are permitted freshmen

8. _________ by keeping down costs will Power Data hold its advantage over other companies.

A. Only
B. Just
C. Still
D. Yet

7. Only after my friend came _________.

A. did the computer repaired
B. be repaired the computer
C. was the computer repaired
D. the computer was repaired

II. Choose the best answer.6. Only then _________ how much damage had been caused.

A. she realized
B. she had realized
C. had she realized
D. did she realize

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