用所给词语的适当形式填空 20.How many (child) are there in your class?There (be) thirty.

用所给词语的适当形式填空 20.How many (child) are there in your class?There (be) thirty.
21.A chicken (have) two (foot) .22.I’d like __________(buy) some (peach) in the supermarket.23.Let (we) (help) (she) with (she) homework