( )My broyher wants to be a teacher when he _
题目
( )My broyher wants to be a teacher when he _
A.will grow up B.grew up C.is growing up D.grows up
( ) You should keep the tank _
A.clean B.cleaned C.cleaning D.to clean
( ) If a dog is hungry,he _
A.barks B.will bark C.bark D.barking
( )My dogs are friendly,_ yours?
A.what B.and C.how D.with
答案
D A B B
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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