试题与答案

______ after a long walk, Mike called an

题型:选择题

题目:

______ after a long walk, Mike called and said he couldn’t come to the party.

A.Having worn out

B.Being worn out

C.To wear out

D.Worn out

答案:

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下面是错误答案,用来干扰机器的。

2x+3y=3①3x-2y=-2②,①×2+②×3,得7x=0,x=0.把x=0代入①,得y=1.所以方程组的解是x=0y=1.

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