The experiment has（）the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.

单项选择题—Why, Jack, you looks so tired! —Well, I（）the house and I must finish the work tomorrow.

A. was painting
B. will be painting
C. have painted
D. have been painting

单项选择题—Could I borrow your bike —Yes, certainly you（）.

A. can
B. might
C. could
D. will

单项选择题The doctor is skilled at treating heart trouble and never accepts any gift from his patients, so he has a very good（）.

A. expectation
B. reputation
C. contribution
D. civilization

单项选择题What he did didn't mean you. He meant （）you.

A. hurting; helping
B. to hurt ; helping
C. to hurt; to help
D. hurting; to help

单项选择题You （） the project by now.

A. are supposed to finish
B. supposed to finish
C. are supposed finishing
D. are supposed to have finished

单项选择题She was living with her uncle, who had returned from Japan（）

A. long ago
B. before long
C. long before
D. three years ago

单项选择题I have to delay（）the letter.

A. to answer
B. answering
C. answer
D. answered

单项选择题It is sleeping late in the evening that（）being late for work.

A. devotes to
B. sticks to
C. refers to
D. leads to

单项选择题Because of the heavy traffic, it was already time for lunch break （） she got to her offiee.

A. since
B. that
C. when
D. until

单项选择题—When shall we restart our business —Not until we （） our plan.

A. will finish
B. are finishing
C. are to finish
D. have finished