1. Mai will finish cooking, then she will phone us.
-> after......
->before.....
2. I tidied the room after the guests had come home.
->when....
3. I do morning exercises, then have breakfast.
-> after......
4. My little Brother has cried for half an hour.
->...........
5. Five years ago, i began learning how to use computer .
->.......
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Sinh Học lớp 12
