Question

【题目】For Liangliang, it's difficult __________ the river to school every day.

A.crossB.crossesC.to crossD.across

Answer 1

【答案】C

【解析】

句意：对亮亮来说，每天过河去上学是很困难的。

考查动词不定式。cross动词原形；crosses动词三单；to cross动词不定式；across介词；it is+形容词+ to do sth表示“做什么怎么样”，根据“it's difficult”可知缺动词不定式作真正的主语，故选C。