Student Book Answer Key

Student Book Answer Key Exercise 8, p. 4. 1. have done 4. have studied 2. had done 5. had studied 3. will have done Exercise 11, p. 6. 1. studies 2. is studying 3. studied 4. was studying 5. will study / is going to study 6. will be studying / is going to be studying 7. has already studied 8. had already studied 9. will already have studied 10 ... ................
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