Sarah是班长,老师走进教室准备上课,她应该这样说:A. Sit down. B. Stand up.
There _________ some storybooks and a Walkman under the desk.
I was at home_________ my parents last Sunday.
一Where are _________?一They are on the desk.
What _________ yon_________ for breakfast yesterday?
This afternoon I_________ a VCD under the Christmas tree.