Question

The boy became fatter and fatter each day and __________ made his parents sad.

A．which

B．what

C．he

D．it

Answer 1

D

考查并列句，此题由连词and 连接，前后应是完整的句子，第二个分句缺少主语故用it ,若把连词and去掉，前加上逗号，可选which看成非限制性定语从句，所以选D。