c b d b d d a a d b b c a a b d a c d a
1.are-is
2.no-not
3.gone-been
4.shall-will
5.yesterday-the day before
6.is-are
7.here-there
8.the boy is old enough to go to school
10.不知
11.they are talking to each othe
c b d b d d a a d b b c a a b d a c d a
1.are-is
2.no-not
3.gone-been
4.shall-will
5.yesterday-the day before
6.is-are
7.here-there
8.the boy is old enough to go to school
10.不知
11.they are talking to each othe