1Mr.Greem always______weekends playing with his children.
题目
1Mr.Greem always______weekends playing with his children.
A.spends Btakes C.costs.
2.Thank for helping me ____my lessons.(填一介词)
答案
1.A.完整的结构是spend time (in) doing sth.
It takes time to do sth.
Sth costs sb money
2.with
help sb with sth.
help sb in doing sth.
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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