Lily has uncle. He is honest gentleman．

Mr. Yang’s daughter is pretty good_____drawing pictures and she won many prizes.[ ]

Whyto ask your friends to Huangshanhu Park.

The principal is not here, and you’d better call him ______ 3 p.m. ______ 5 p.m. tomorrow. [ ]

It was not until the beginning of the twentieth century________to explore space.