Question

【题目】It was difficult __________ something because it was dark.
A.see
B.to see
C.sees
D.seeing

Answer 1

【答案】B
【解析】考查动词不定式作真正的主语，句式：It is +形容词+to do sth.，故选B; 句意：因为太暗了，所以看见东西很难。