-Excuse me.Could you wake me up when my friend ______here?-Of course.But we still don’t know when your friend ____ here.
Progress ____so far very good and we are sure that the work will be finished on time.
My American friend Sam is interested in Yangzhou very much. He wonders _______.
It is said that the gravity on Mars is only about __________ of the gravity on earth.
While Helen _____ along the river after supper, she ____ a wallet lying on the roadside.A. was walking; was finding B. walked; foundB. walked; was finding D. was walking; found
I stopped the car ____ a short break as I was feeling tired.