根据句意,用所给动词的适当形式填空。

小题1:The teacher told us that the earth       (travel) around the sun.

小题2:Trees and grass play an important part in _______ (help) improve our environment．

小题3:Many trees___________(plant) in my hometown every year.

小题4:CCTV is starting a project _________( call ) “Looking for the most beautiful country teachers.”

小题5:We are talking about where ___________(spend ) our coming winter holiday.

葡萄酒在酿造过程中去除葡萄的梗是因为（）

A、葡萄梗中的单宁收敛性太强

B、去除杂质

C、梗有苦味