智慧职教: I was almost asleep last night when I suddenly heard the dog ________ outside.
举一反三
- I was almost asleep last night when I suddenly heard someone ( ) at the door.
- 中国大学MOOC: Tracy was almost asleep last night when she suddenly heard someone (cry) ______ outside the door.
- I was almost asleep last night.........................(as, when) I suddenly heard someone knocking on the door.
- I was almost asleep last night when I suddenly heard someone _____ at thedoor.(2013年真题） A: be knocking B: knocking C: to knock D: having knocked
- I was just falling sleep last night when I heard a knock at the door.