, they couldn’t make their head teacher change her mind.
A. Whatever hard they try
B. No matter how they tried hard
C. As they tried hard
D. Hard as they tried
网友回答
A. Whatever hard they try
B. No matter how they tried hard
C. As they tried hard
(答案→)D. Hard as they tried
解析：句意：虽然他们努力了，但是不能让班主任改变主意。这里使用了as的倒装句：副词/动词/名词/形容词+as/though+主谓，表示转折关系，C项没有倒装，A项whatever修饰名词，B项应该是No matter how hard they tried ，所以选D。