填空 1.They ____________(play) a day out for the exchange students from the USA at that time.
题目
填空 1.They ____________(play) a day out for the exchange students from the USA at that time.
填空
They ____________(play) a dayout for the exchange students from the USA at that time.
---What _________________ Kitty____________(do) at 10.a.m.yesterday?
--- She ___________(dance) in that room.
Your cousin________________(not play) volleyball when I saw him.
____________ he___________(make) a model plane at 2:00 yesterday afternoon?
When I ____________(leave) home,my sister ______________(eat) breakfast.
What ______________(happen) inthe next room last night?
When I came to see him,he_________________(search) for some information on the Internet.
Girls _________________(dance)while boys _______________(sing).
Where __________they___________(play) football when the teacher looked for them?
When I saw you,who___________you ____________(talk) with?
答案
过去进行时用was/ were+ doing
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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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