The smiths _____(have)supper when we entered in.上面打错了，这个才是：The smiths _____(have)supper at home when we entered it.教材答案上写的是：was having为什么？

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• The smiths _____(have)supper when we entered in.上面打错了，这个才是：The smiths _____(have)supper at home when we entered it.教材答案上写的是：was having为什么？
• Not only__to Beijing,but I've also climbed the Great Wall.A.I have been B.have I been 该选哪个?
• We usually eat lunch at home, why don't we make a _______ to eat at the restaurant.a changeb turnc rund go