11.(B)the world
12.(D)the piano
13.(D)student
14.(C)which
15.(C)find
16.(B)too old
17.(B)had I got
18.(A)an
19.(B)that
20.(D)them.
11.(B)the world
12.(D)the piano
13.(D)student
14.(C)which
15.(C)find
16.(B)too old
17.(B)had I got
18.(A)an
19.(B)that
20.(D)them.