题目内容

By the time you get back, I__ all the work()

A. would finish
B. will have finished
C. has finis
D. had finished

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With his hard work, John ____ the basic knowledge of computer()

A. has caught
B. has acquired
C. has required
D. has acknowledged

Tetrachloromethane, CCl4, is a()

A. polar molecule with polar bonds
B. polar molecule with non-polar bonds
C. non-polar molecule with polar bonds
D. non-polar molecule with non-polar bonds

There were___ for Saturday’s movie()

A. not available tickets
B. no available
C. no tickets available
D. tickets no available

Which statement about ethanol is correct()

AIt burns in air to form ethene and water
BIt is prepared from ethene by fermentation
CIt is prepared from glucose in an addition reaction
DIt is the only product when ethene reacts with steam

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