Hello, Mike. Long time no see, Where are you?—Oh, not only my parent but also I __ Wuhan for a month.

At that time we lived in houses which ___________ old, cold and unsafe.

Liu Yang is the first Chinese woman astronaut ______ has ever traveled in space.

We can’t live _____ air or water.[ ]

Where is Jim? I can’t find him. -Oh, he to Beijing.