Choose the best answer to complete the sentence.
4.You ________ be nice to girls. Be a gentleman!
A. must to
B. should not
C. should
D. have not to
5.________ I call her to come?
A. Shall
B. Should be
C. Have to
D. Need
6.You ________ cross the intersection when the traffic light is red.
A. must
B. must be
C. must not
D. musted
7.You ________ do this exercise. It’s not compulsory.
A. have to
B. do not have to
C. must
D. need
8.It’s 11 p.m. already. I ________ leave now.
A. am
B. should not
C. do not have to
D. must
9.How often do you go to ________ dentist?
A. a
B. an
C. the
D. x
10.I have ________ problem. Can you help me?
A. a
B. an
C. the
D. x
11.Thank you very much! It is ________ useful piece of advice.
A. a
B. an
C. the
D. x
12.Would you like to travel in ________ space?
A. a
B. an
C. the
D. x
13.This is ________ most outrageous outfit I have ever seen.
A. a
B. an
C. the
D. x
14.Being a ________ student really benefits you when you study abroad.
A. fluent
B. bilingual
C. clue
D. mysterious
15.You should listen to ________ speakers to boost your pronunciation skills.
A. fluency
B. treasure
C. intensive
D. native
16.Buckingham ________ is a must-see destination if you visit England.
A. World
B. Country
C. Capital city
D. Palace
17.Burj Khalifa is the tallest building in the world, which is in Middle ________.
A. East
B. North
C. South
D. West
18.To broaden your ________, studying new words every day is a good way.
A. grammar
B. communication
C. vocabulary
D. conversation