Sandy is taller than _______ in her class..

He promised to come to see you. —— But he ＿＿＿＿＿. I’ve been all alone.

In the end，all of us managed ________ to the top of the mountain，tired but happy.

China issued new plan which calls for immediate action to deal with country worsening air pollution.

Riding a bicycle can be fun. But ______ you ride a bike to work, and then there isn’t one to ride home