When I got to the checkout counter, I realized I didn’t have enough money, so I kept ________ I really needed and left the rest．

A.what

B.which

C.that

D.this

答案及解析： A

考查宾语从句的连接词。Kept后面是宾语从句，且从句缺少needed的宾语，所以what引导，选A。