I.
1. A
2. C
3. A
4. A
5. C
II.
1. at
2. on, at
3. on
4. in
5. in, in
6. in, with
7. at, about, in
III.
is → teaches → gets → prepares → goes → comes → has → takes → stays → does → is → is → doesn't work → listens → cooks → takes → is
IV. (mỗi dòng 1 lỗi)
has → have
aren't → don't
a ten minutes → ten minutes
importance → important
exciting → excited
is → are
chatting → chat
ring → rings
This → These
they → their
