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

题目

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?

答案

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