The teacher asked the students______
题目
The teacher asked the students______
A.if they were interested in dinusaurs
B.when was Albert Einstein born
C.what they will do with the computers
D.how many trees they have planted
问：为什么选A而不选D?
答案
正确：A
宾语从句时,主句为一般过去时时,从句通常套用过去时态的某种形式.如果D的have改为had,则也是正确的.
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
最新试题
热门考点