问题
选择题
____ made things worse, he said, was that his roommate never took part in any of the cleaning work．
A．What
B．Which
C．That
D．Who
答案
答案：A
考察主语从句。What引导起主语从句what made things worse并在句中作主语，结合句意可知A正确。句意：他说：让事情更糟糕的是他的室友从来不参加清洁工作。
