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My mother was cooking while I____ the radio.

—What bad weather!
—Yes. If it _______raining, the fields will be covered with water soon.

－Why didn’t you go to the cinema with us this afternoon, Jim?
－Because I ______ at the station for my uncle from Beijing at that time.

___How time flies!It’s already twelve o’clock.
___ Oh,really? I ______ it at all.

—Do you know the nearest way to the science museum?
—Sorry, I’m a stranger. This is the first time I _________ here.

___________ from space, the earth looks like a blue ball.

The life we were used to __________ greatly since 1992.

Help! Tom ________ an accident.

Lisa wrote a letter in the morning, but Bob _______.

Peter has many brothers, but he _________ have any sisters.