选择题。
1. I ______ cooked a meal when you _____ me.
a. cooked, were ringing b. was cooking, rang c. was cooking, were ringing d. cooked, rang
2. He said he _____ to draw a plane on the blackboard at that time.
a. tries b. tried c. was trying d. will try
3. While she ______ TV, she ______ a sound outside the room.
a. was watching, was hearing b. watched, was hearing c. watched, heard d. was watching, heard
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