One of the boys suggested ____ and we were happy about this.
题目
One of the boys suggested ____ and we were happy about this.
A.go camping B.going camping
C.to go camping D.go for camping
答案
选B,suggest+名词/动名词
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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．
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