—Are you sure you have to do this now? It's been very late.
—I don't know to do it if not now.
A.where B.how C.what D.when
During this year's Spring Festival, ________ people in China caught pneumonia(肺炎) that doctors had to work hard all the time.
A.such B.such many C.so many D.so much
More and more foreigners are interested in traditional Chinese culture, ________ Beijing Opera.
A.first of all B.above all C.at all D.after all
Dan shows an interest in musical instruments and is often heard _____ the guitar.
A. play B. played C. playing D. to play
Don’t you think the report is worth________?
A.to listen to B.being listened to C.listening D.listening to
My cousin in an American high school as an exchange student for two months last year.
A.studied B.has studied C.studies D.was studying
