Going swimming in the summer is very interesting

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Question 16.Going swimming in the summer is very interesting..
A. is it
B. isn't it
Question 17.These English books... yesterday.
A. bought
B. buy
Question 18.Ba is tired.
A. because
Question 19.If the disaster....
A. happens
Question 20.I live in Da Lat, .
A. who
Question 22. If I were a bird, I
A. will
B. which
Question 21.He isn't going to the concert...
A. Though
B. in spite of
be a dove.
Question 24.These children,
A. whom
..... he stayed up late watching TV.
B. as
B. would
Question 23.No one in the volunteer group is_
A.more active as
B. as active than
C. since
in an area, people from other areas will offer help.
B. will happen
C. happening
is one of the most beautiful cities of Vietnam.
C. whom
..the tickets are too expensive.
C. because
C. are they
B. that
C. was bought
Jack is.
What about you?
C. shall
C.more active
parents work late, are taken home by bus.
C. their
D. aren't they
D. were bought
D. A,B, and C are correct
D. would happen
D. whose
D. because of
D. may
D. so active as
D. whose