The population of the world still now.
Would you mind ______ those old jeans?
I have been skating _______ nine o’clock.
He _____ when the UFO arrived.
—Can you speak English,Mr Wang? —Yes’but only________. A.little B.a little C.a lot
Since you are tired,you’d better________and have a good rest. A.stop to study B.stop study C.stop studying