Question

【题目】--Do you know how many colours ______ in a rainbow?

--Seven.

A. are there B. there are

C. is there D. there is

Answer 1

【答案】B

【解析】句意：——你知道彩虹里有多少种颜色吗？——七种。作为动词know的宾语从句用陈述语序，主语how many colours是复数，故谓语用复数形式，故用there are，故选B。