With Chang’e II launched successfully, China isto send up a manned spaceship to the moon within five or six years.

I’m badly in need ______ your help

I ______have come here in time, but I met an old friend of mine. I stopped and talked with him for some time.

This can ___ her ___ touch with the workers.

reets here are crowded with cars, so I prefer________here rather than_______ .