题目内容

对矩阵a进行初等变换冰化为行最简形记为B

A. 对
B. 错

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By the end of this year ,I ____enough money for a holiday

A. will save
B. will be saving
C. will have saved
D. have saved

I have been studying here for four years by next summer ____.

A. shall graduate
B. shall be graduated
C. shall be graduating
D. shall have graduated

I hope her health _______greatly by the time we come back next year.

A. improves
B. improved
C. will be improved
D. will have improve

Are yougoing to Richard”s birthday party?„-- “Yes. By then I _____myhomework..”

A. had finished
B. will have finished
C. would have finished
D. finished

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