Question

【题目】They carefully, but nothing.

A. listened; hear B. listened to; heard

C. listened; heard D. listen; heard

Answer 1

【答案】C

【解析】试题分析：句意：他们认真地听，但什么也听不到。Listen强调动作，加上to后面要有宾语；hear强调结果。故选C。