问题

It is ___________ the customers’needs that has made chain stores so popular in big cities in China
A:that
B:what
C:when
D:which
B:what
C:when
D:which
正确答案是:
同类题型
We’re going to have a basketball match with Class 3 next week.— _____________!
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Put some butter on a slice of bread and add a teaspoon of butter. What else—Next some tomatoes.