There is an increasing concern _____________ about Ebola infection. Every country has taken necessary measures to prevent it.
A. unnecessary B. sudden
C. nationwide D. worldwide
In the noisy crowd, I had to raise my voice to make myself ___________.
A. hear B. hearing
C. to be heard D. heard
As we can see, Peter is very happy, so he___________ have passed the exam. After all, it’s not difficult at all.
A. must B. would
C. could D. should
—Is Bob still a volunteer?
—No, but he _____. He worked for the 2008 Beijing Olympic Games.
A．used to B．used to be
C．used to do D．was used to
You’d better _______ because I’m busy writing a letter to my parents.
A. leave me alone B. leave me behind
C. set me aside D. set me off
Last month we students all had some great speeches. The headmaster together with some other teachers __________ to attend it, too.
A. were invited B. was invited
C. has invited D. invited
