is a good of exercise for both the young and the old.A．the walk B．walkingC

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is a good of exercise for both the young and the old.

A．the walk

B．walking

C．To walk

D．walk.

答案

解析

略

举一反三

a rely, he decided to write a sixth letter.

A．Not receiving	B．Not to receive
C．Not having received	D．not received.

题型：不详难度：| 查看答案

more attention, the tree could have grown better.

A．Given

B．To give

C．Giving

D．Having given

题型：不详难度：| 查看答案

Upon ______ the office, he saw the message on his desk.

A．he arrived

B．arrived at

C．arriving at

D．arriving

题型：不详难度：| 查看答案

As the final examination is coming , the students are busy ____ it.

A． preparing

B． preparing for

C．prepare

D．prepare for

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____ himself with necessary knowledge and skills, Tom went to the job market with much confidence.

A．Equipped

B．Equipping

C．Having equipped

D．Being equipped

题型：不详难度：| 查看答案