單項(xiàng)選擇題

We can（）the possibility of total loss from our calculations.

A.exclude
B.prevent
C.excuse
D.discard

在線(xiàn)練習(xí)

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The noise was caused by a dog（）a cat through the garden.

A.chasing
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單項(xiàng)選擇題

A new spaceship was（）at Cape Kennedy yesterday.

A.motivated
B.released
C.transmitted
D.launched

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