Mr. Smith didn’t go to the party because

问题选择题

Mr. Smith didn’t go to the party because he had a lot of experiments _____.

A．do

B．did

C．done

D．to do

答案

答案：D

题目分析：考查不定式的用法：句意：史密斯先生没有去参加晚会,因为他有许多实验要做。Have sth to do，有…事情要做，这里不定式做后置定语，修饰experiments，选D。