Mr. Chen has a loud voice. His voice can ______ clearly, even in that big classroom.
A. be heard B. hear C. be hearing D. have heard
I ______ to think my job was ______. But now I think it is interesting.
A. used; bored B. am used; boring
C. am used; bored D. used; boring
The ______ old woman often walks in the park ______.
A. alone; lonely B. alone; alone C. lonely; alone D. lonely; lonely
We want to be ______ because, as students, we should learn to help other people.
A. performers B. interviewers C. patients D. volunteers
I am too busy to listen to her ______ talking. She has talked for about two hours.
A. hopeless B. endless C. harmless D. careless
－Look, your sister is playing the piano over there.
－She ______ be my sister. She has gone to America.
A. mustn't B. can't C. shouldn't D. may not
