______ is known to us all , the old scientist,______ life was hard in the past, still works hard in his eighties.
The radio club in our school, which is in ___ charge of He Wei, is much more than just to play _____ music for everyone.
Walking on the street,___________.
When you study the local map, you'll find this town is ________.
Passengers are permitted to _________ only one piece of hand luggage onto the plane.
You can’t rely________ him to pick you up. He is still a green hand.