—Are you in a hurry?—No,I've got plenty of time. I ________ wait.教育名师原创作品
You know the boy is ____ playing the piano.
We should play a part in ______ the earth.
The two students practice spoken English______ joining the English club.
You can’t get good grades______ you study hard.
-I can’t decide______. – You mean the red one or the blue one?