You should drink________water if you have a cold.

I think ____ of the materials I listened to at the beginning of the exam ____ easy.

How was your last weekend ? – It relaxing. I great fun.

It is a long time _____I saw you last． ——Yes．And it will be a long time _____ we see each other again．

If you are weak ______ a subject, ______ and asking a teacher for advice can help.[ ]