We __________ (do) some cleaning at that time.
A: did
B: did doing
C: were doing
D: are doing
A: did
B: did doing
C: were doing
D: are doing
举一反三
- What ____ you ____at this time yesterday evening A: was; doing B: did; do C: were; doing D: have; done
- We agree to（）the test. A: Ayou did B: Byour doing C: Cyours doing D: Dyou do
- It’s high time we ____something to stop road accidents. A: did B: are doing C: will do D: do
- What ____you ___(do) at that time? We ____(watch) TV. A: were, doing B: were watching C: was, doing; D: are watching
- He ______ some cooking at that time, so _____ me. A: did… heard B: did… didn't hear C: was doing… heard D: was doing… didn't hear