题目内容

The park is always full of people, ______ themselves in the sunshine.

A. having enjoyed
B. enjoyed
C. enjoying
D. to enjoy

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A small plane crashed into a hillside five miles east of the city, _______ all four people on board.

A. killing
B. killed
C. kill
D. to kill

With the teacher's words________ in their ears, the students worked hard at their schoolwork.

A. ringing
B. to ring
C. rung
D. rang

With so much work ________ my mind, I almost break down.

A. filled
B. filling
C. to fill
D. being filled

The needle treatment ________ back to the ancient times has cured many diseases.

A. to date
B. dating
C. being dated
D. dated

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