EBOLA is said_______ another big health challenge to our humans over the past several months .

ind of job have you ever done before–Oh, I _________ for an engineering company for threeyears,

Why do you recommend Li Hong for the Best Student Award—She is good at all the subjects. __________, she is polite and helpful.

He tried to be ______, but his trembling hands gave him away.[ ]

Mr Jones called while you were out. He was in badtemper.