用所给单词的正确形式填空小题1:A number of ________(student) often help the

用所给单词的正确形式填空
小题1:A number of ________(student) often help the old people on weekends.
小题2:Thanks a lot for ________ (teach) us so well, Miss White.
小题3:Tom is much ________(thin) than his friends.
小题4:He is not funny, and he is always very ________(serious).
小题5:He would like ________ (have) a cup of tea.