21)be covered with 被……覆蓋……
22)be in (great) need of (很)需要
23)be in trouble 處于困境中
24)be glad to do sth. 很高興做……
25)be late for ……遲到
26)be made of (from) 由……制成
27)be satisfied with 對(duì)……感到滿意
28)be free 空閑的
29)be (ill) in bed 臥病在床
30)be busy doing (with) 忙于做……(忙于……)
22)be in (great) need of (很)需要
23)be in trouble 處于困境中
24)be glad to do sth. 很高興做……
25)be late for ……遲到
26)be made of (from) 由……制成
27)be satisfied with 對(duì)……感到滿意
28)be free 空閑的
29)be (ill) in bed 臥病在床
30)be busy doing (with) 忙于做……(忙于……)

