.Wewilllearnhowtooperatethemac

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We will learn how to operate the machine _______.

A．at a time

B．at one time

C．at the time

D．in time

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Nowhere else along the coast _______ so far from land.

A．is there such shallow water

B．is there so shallow water

C．there such shallow water is

D．there is such shallow water

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Knowing how to think clearly and how to speak correctly ________ one confidence.

A．give

B．has given

C．have given

D．gives

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The visitors stood at the top of the mountain ________ east of the city, watching ______ burning sun rising.

A．the; a

B．\; the

C．the; the

D．\; a

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_______ an important decision more on emotion（情感）than on reason, you will regret it sooner or later.

A．Basing

B．Based

C．To base

D．Base

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When deeply lost in thought, _______ he often was, he would forget all about eating or sleeping.

A．that

B．where

C．which

D．when

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