Somescientistsbelievethatitwon

Some scientists believe that it won’t be long _______ robots are widely used in all walks of life．

A．since

B．after

C．before

D．until

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I hear that apple juice is healthy drink.

A．不填；a

B．不填；不填

C．an; a

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A．even though

B．as though

C．even as

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A．when

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—_______ John this week?
—Yes.
—Where _______ him?
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A．Did you see; did you see	B．Have you seen; did you see
C．Do you see; have you seen	D．Have you seen; have you seen

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Then ________ we had been looking forward to.

A．came the hour	B．the hour came
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