Soundtravelsairaspeedofabout34

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Sound travels ______ air ______ a speed of about 340 metres per second.

A．over; in

B．through; at

C．by; at

D．through; over

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The girl who _______ beautiful eyes _______a prize in yesterday’s singing contest.

A．has; wins	B．had; won
C．having; won	D．has; won

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—Do you like watching the talk show?
—Yes. It always makes people _______.

A．to laugh	B．laughing
C．laugh	D．laughed

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—What do you think of the two pairs of trousers?
—They don’t fit me well. They are _______ too long _______ too short.

A．not only; but also	B．both; and
C．either; or	D．neither; nor

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—Why was Miss Read so angry with you this morning?
—She asked me _______.

A．why I was late for school again

B．how I came to school this morning

C．what did I have for breakfast

D．what time did I go to bed last night

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—It’s dangerous to swim here. Look at the sign!
—Oh, I _______ it.

A．didn’t notice	B．don’t notice
C．hadn’t notice	D．haven’t notice

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