________ good use you have made of your time to work, there is still some room for improvement.
A.Whatever | B.However | C.Though | D.Whether |
.
About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
A.is; doesn’t | B.are; don’t | C.are; doesn’t | D.is; don’t |
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— Have you thought of a theme for your poster yet?
— No, I ______ a lot about it, but I haven’t decided.
A.will think | B.have been thinking | C.had thought | D.was thinking |
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______ left before the deadline, it doesn’t seem likely that John will finish the job.
A.Though such a short time | B.Because such a short time |
C.With such a short time | D.As such a short time |
.
Medical ______ shows that men are more likely to have heart attacks than women.
A.expectation | B.evidence | C.experience | D.exchange |
.
Several years had passed ______ I finally realized the true value of friendship.
A.when | B.that | C.after | D.before |