—How much one donut? (   )
—One yuan.

A．for

B．are

C．do

He is famous ______ his inventions. ( )

A．at

B．for

The modern Olympic games are different____ the ancient ones.(   )

A．of

B．from

C．at

选择恰当单词，补全句子。
at    of    to    in    by
【小题1】We stayed in a hotel _________ the sea.
【小题2】I went _________ Harbin.
【小题3】We have learned a lot _________ English words.
【小题4】We enjoyed the moon and stars _________ night.
【小题5】Many students are interested _________ English.

My mother takes good care ____ the baby. (    )

A．of

B．for

C．at