55.3
题目
55.3
do you know that our monitor,along with some other classmates,____our maths teacher in hospital already
a.have visited
b.will visit
c.has visited
d.had visited
答案
C对,
句子的主语是our monitor.
along with some other classmates是伴随状语.根据主谓一致的原则和句子中的时间状语already可以确定答案是C.
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．
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