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Mr Green is very strict his students, and he is also strict his work.

A. in; with B. with; in

C. with; with D. in; in

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TOKYO, JAPAN – What do you do when you see a cockroach (蟑螂)? Do you hit it with a newspaper? Do you step on it?

When researchers at Tokyo University see a cockroach, they take the remote control and make the cockroach turn around, run left or right, or go forward. These scientists are changing the cockroaches into robots(機器人). Each cockroach has a very small packet that has in it a microprocessor (微處理器). Then researchers can send signals (信號) from the remote control to the packet. The signals control the movements of the cockroaches.

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With a remote control, the scientists send signals to the packets. When a cockroach gets the signal, it moves. The problem is that the cockroaches don’t always move in the right direction.

1.The scientists are changing the cockroaches into robots because ______________________.

A. they want cockroaches to do things people can’t in the future

B. they want to control the movements of the cockroaches

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D. they want to send signals to the packets on the cockroaches

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B. The cockroaches are too big to move through earthquake rubble.

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D. The cockroaches can only lift 20 times their own weight.

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