Choose the best answers

Exercise 9. Choose the best answers.
1. - "Here's my phone number".
"Thanks. I'll give you a call if I
A. will need
B. need
2. The patient will not recover unless he
A. had undergone
C. undergoes
3. If it
A. be
4. If we meet at 9:00, we
A. have
B. is having
5. If you learn online, you will find it difficult
A. concentrated B. concentrating
6. Linh and Quan have similar
A. problem
B. ideas
7. What do people do to
A. maintain
B. would undergo
D. was undergoing
convenient, let's go out for dinner tonight.
B. is
C. was
plenty of time to talk.
C. will have
B. stay
8. Thais greet other people by
B. saying
some help tomorrow"
D. needed
C. would need
B. basic
an operation.
C. concentrate
C. idea
traditional lifestyles?
C. carry
"sawadee".
A. bowing
C. practicing
9. What is the
food in your area? - It's rice.
A. core
C. staple
10. Many students like studying online because it's
A. harmful
B. dependent
D. were
about online learning.
C. convenient
D. had
D. to concentrate
D. ideal
D. serve
D. telling
D. key
D. time-consuming