____ is essential to a successful scientist

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【单选题】

____ is essential to a successful scientist; he cannot hope to make any progress if he cannot work in a controlled way.

① Discipline

② Decision

③ Declaration

④ Dependence

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【单选题】

For a successful business, friendly and __________ staff are essential.

① sufficient

② effective

③ efficient

④ respective

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【单选题】

______, the experiment will be successful

① If carefully doing

② If did carefully

③ If carefully done

④ If doing carefully

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【单选题】

____ the whole, it was a successful evening.

① On

② At

③ From

④ In

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【单选题】

It was essential that her thinking ______ calm and reasoned.

① remained

② remain

③ had remained

④ would remain

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【单选题】

A note has three essential components the addressee, the sender and [].

① date

② solution

③ message

④ complimentary close

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【单选题】

This is a very difficult operation. It is essential that you __________ for emergency.

① are to be prepared

② would prepared

③ be prepared

④ must be prepared

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【单选题】

17._____ of English is essential for those who apply for the post.

① Good knowledge

② A good knowledge

③ Good knowledges

④ The good knowledge

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【单选题】

He set up in business ____ his own and was very successful

① in

② of

③ on

④ by

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【单选题】

The essential difference between grammar and lexicology is that the former deals with_______of words and the latter with _______ of words.

① meanings; forms and structures

② forms and structures; meanings

③ forms; structures and meanings

④ meanings and forms; structures

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