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更新 2022-09-03
科目英语
题型单选题
难度较易
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When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

A．that

B．it

C．this

D．what

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相关试题

---Will the Smiths go abroad this summer?
---No, they finally decided _______.

A．to

B．not going

C．not to

D．not to be going

题型：未知
难度：未知

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The patient was warned _______oily food after the operation.

A．to eat not

B．eating not

C．not to eat

D．not eating

题型：未知
难度：未知

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Charles Babbage is generally considered _______the first computer.

A．to invent

B．inventing

C．to have invented

D．having invented

题型：未知
难度：未知

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The matter had better _______ as it is.

A．leave

B．being left

C．leaving

D．be left

题型：未知
难度：未知

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We’re looking forward ___________the photo exhibition.

A．to visiting

B．to visit

C．to having visited

D．visiting

题型：未知
难度：未知

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