Question

I understand you have studied French,and you can speak it very well

A.that 不填 B.不填 thatC.不填 不填D.how that
选B，为什么？

Answer 1

I understand ____you have studied French, and ____you can speak it very well.
第一个空是understand的宾语从句 that 可以省略，第二个空，也是understand 的宾语从句，但是因为有而且要有and 表示和前面的宾语从句并列，这时这个that 就不能省略。所以选B