— Why do you do volunteer work in the North—West?— I_____ to improve the lives of the children there through my efforts.
The bad weather meant_________ the rocket launch for 48 hours.
Tom likes to _________ this kind of cap on.
In the market,vegetables are sold by_________ kilogram,I mean,by _________ weight.
________he will come to help us is not clear.
—Did you get a ticket? —No,I_________,but there wasn’t any left.