Evdence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.
We must take two aspects into consideration , both of _______ associated with the safety of the students .
---Do you think he will do me a favor? ---As far as I know, he is the last one to help others. He _______ be prepared to give you a hand, though.
The cave is _____to the public, high up the face of a cliff which no one can climb.
—Excuse me! I’d like to book a table for four for the dinner tonight. —Sorry, sir, but there is_____ available tonight. You many try ______ restaurant.
He __________ with business matters . Otherwise , he would have given you a hand .