—Have you ever been to Shanghai?—Yes, I there last week.A. went B. have gone C. go
She opened all the windows _____she could take a bit more of fresh air.
--____are you staying in Ottawa? --About two weeks.
–Oh! There is a snake in front of Jay. --But it seems that he doesn’t ___the danger.
Uncle Wang didn’t stop to have lunch __he finished mending the TV set.
Our teacher said sound___much more slowly than light.