2. 职称英语
  3. I was almost asleep last night when I suddenly heard someone ______ at the door.

I was almost asleep last night when I suddenly heard someone ______ at the door.

游客2024-06-27  29
问题 I was almost asleep last night when I suddenly heard someone ______ at the door.
选项 A、be knocking
B、knocking
C、to knock
D、having knocked
答案 B
解析 本题考查对动词习惯用法的掌握。 hear sb. doing sth．意为听见某人正在做某事。
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