Liu Xiang trained so hard ______ he hurt his foot.
Your keys are on the desk. Please __________.
—Excuse me. How can I get to the library?—walk along this street_______ you see the traffic lights. You will find it on your left.
We can play ______ , but we can’t play________.
— _______ _______do you go to the library?—Twice a week.
There a lot of _______. in the park.