用所给单词的适当形式填空。
【小题1】Water is very________(use).
【小题2】We use wood________(make) chairs.
【小题3】Trees help________(keep) the air clean.
【小题4】________(protect) the Earth, we should________(save) water.
【小题5】Look! They________(do) a project.
【小题6】Please tell________(they) about Christmas.
【小题7】He starts________(sing).

--What_______your father_______?
-- He is a teacher.

A．is, doing

B．is,do

C．does, do

What will you____________(do), Shanshan?

写出下列单词的正确形式。
【小题1】like （过去式）________
【小题2】box （复数形式）________
【小题3】thought （原形）________
【小题4】he （宾格）________

I spring, but Li Li  fall.(   )

A．like; like

B．like; liking

C．like; likes