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
--- Children are the future and hope of our motherland. ---_ important work it is to teach children!
A. How B. How an C. What D. What an
Marie Curie ________ radium, but Edison ________ the light bulb.
A.created; discovered B.discovered; invented
C.invented; discovered D.invented; created
—Look! Somebody the lights.
—Well, it wasn’t me. I didn’t do it.
A. turns off B. is turning off C. was turning off D. has turned off
