In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.

My father warned me ___________ going to the West Coast because it was crowded with tourists.

Thanks to the Internet, different kinds of information________ in a short time.

Whatdoesyourbrotherdo —Heisuniversitystudent.

Many people are in great need of extra food.— Yes.It is a challenge to________all their needs. [ ]