【初二英语】【单选】All the students were sweeping the floor____they heard a man ____ “help”.
题目
【初二英语】【单选】All the students were sweeping the floor____they heard a man ____ “help”.
All the students were sweeping the floor____they heard a man ____ “help”.
A.when,shouting
B.while,to shout
C.when,to shout
D.while,shouting
答案
A.when,shouting
1.when = 就在这个时候（突然）；
2.hear sb shouting help 听到某人在大喊救命
3.所有的学生都在扫地,突然听到有人喊救命.
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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