1. A. used to B. use to C. be used to D. use
2. A. is B. are C. were D. was
3. A. had to B. have to C. has to D. must have
4. A. was B. had C. has D. is
5. A. will come B. comes C. was coming D. come
6. A. hasn't come B. didn't come C. haven't come D. came
7. A. doesn't B. don't C. won't D. didn't
8. A. were B. is A. are D. was
9. A. yesterday B. this day C. those days D. tomorrow
10. A. because B. since C. as D. even though
thà dở đáp án sau sách ra còn hơn
