21. He will not be __________ to vote in this year's election.
A. old enough
B. enough old
C. as old enough
D. enough old as
22. _______ extended family include several generations living together in the same house.
A. A
B. An
C. The
D. Ø
23. The crowd at the basketball game were wild_______excitement.
A. for
B. like
C. in
D. with
24. I've tried those tablets and they are not_______in helping me stop coughing.
A. effective
B. successful
C. profitable
D. helpful
25. Which is_______, Mount Everest or K2 in the Himalaya?
A. higher
B. the higher
C. highest
D. the highest
26. He couldn't reach the goal,_______surprised me.
A. who
B. whom
C. which
D. that
27. He will take US to the town __________ we can see old temples.
A. that
B. which
C. when
D. where
28. This is the first time I __________ the experiment on plant breeding.
A. have done
B. do
C. would do
D. did