1 be sure to
2 be through
3 be through with
4 be tired of
5 be tied up
6 be up all night
7 be up to sb.
8 be up to sth./doing sth
9 be used to
10 be way behind in
11 be willing to
12 be worried about
13 be worth sth./doing sth
1 be/get tied up
2 be/go on a diet
3 bear up well
4 because of
5 before long
6 begin one's diet
7 behind the time
8 believe it or not
9 belong to
10 below zero
11 benefit concert
2 be through
3 be through with
4 be tired of
5 be tied up
6 be up all night
7 be up to sb.
8 be up to sth./doing sth
9 be used to
10 be way behind in
11 be willing to
12 be worried about
13 be worth sth./doing sth
1 be/get tied up
2 be/go on a diet
3 bear up well
4 because of
5 before long
6 begin one's diet
7 behind the time
8 believe it or not
9 belong to
10 below zero
11 benefit concert