I want to know______ he"ll arrive on time.[ ]A. that B. when C. wher

题型：同步题难度：来源：

I want to know______ he"ll arrive on time.[     ]
A. that
B.  when
C. where
D. if

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举一反三

You will do much better ___________ you are more careful. [     ]
A. if
B. before
C. although
D. unless

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Emma failed her exams, I think she should work hard.
-I agree. ___________ she does, she"ll get good grades. [ ]
A. If
B. Because
C. Before
D. Though

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—Listen! It is still noisy in the head teachers" office.
—Go and see _______ they have finished correcting the paper yet.         [      ]
A. though
B. whether
C. unless
D. while

题型：模拟题难度：| 查看答案

______ you are in trouble,  let me know.  I"ll give you a  hand.             [     ]
A. Whenever
B. Wherever
C. However
D. Whatever

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It’s a serious problem. We can"t decide        Mr Wang comes back.[     ]
A. while
B. since
C. until
D. so

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