—Look! Someone ________ the floor.
—Well, it wasn't me. I went shopping just now.
A．had swept B．has swept
C．was sweeping D．is sweeping
It's said that they ________ a better life ever since they moved to the US.
A．had enjoyed B．have been enjoying
C．were enjoying D．would enjoy
—Ouch! You hurt me.
—I'm sorry. But I ________ any harm. I ________ to drive a rat out.
A．don't mean; am trying
B．didn't mean; tried
C．haven't meant; tried
D．didn't mean; was trying
In general, most tennis ________ on hard courts or on clay.
A．plays B．is played
C．has played D．has been played
Despite ongoing street protests, US beef ________ in South Korea due to its lower price.
A．is sold well B．sells well
C．sells poorly D．is sold poorly
Today many physical bookstores ________ down with financial difficulties, inflexible management strategies and competitive pressure from online bookstores.
A．had closed B．having closed
C．being closed D．are closing
