Choose the correct options.
1. What ........ at that time yesterday?
were you doing are you doing did you do
2. When the cock ....... food in the garden, he saw a big jewelry box.
finds found was finding
3. While the toirtoise was running to the finish at his best, the hare ......... soundly.
slept was sleeping were sleeping
4. While the grasshoper ......... music, the ants was busy with storing up food for winter.
sang and enjoyed was singing and enjoying sings and enjoys
5. When the mouse came to the lion's cave, he ......... in there.
isn't sleeping didn't sleep wasn't sleeping
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Sinh Học lớp 12
