He goes to school by bus, but he walks ______after school.
They arrived at the finishing line________the same time.We didn’t know who the winner was.
The boy started to play the guitar________the age of seven.
—I had a bad cold. —________.
—Will you have a picnic tomorrow? —Yes.But if it________,we’ll visit the museum instead. A.will rain B.rains C.doesn’t rain
The river will be dirtier and dirtier________we do nothing to protect them.