题目内容

There was a wallet ________ on the ground.

A. lay
B. lying
C. was lying
D. was laying

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We spent two years and a half ________ that factory.

A. built
B. building
C. to build
D. build

Mother came into the room, ________her children.

A. followed by
B. to be followed by
C. having followed
D. being followed

Don’t stop here. Go on ________ until you reach the end line.

A. to run
B. run
C. runing
D. running

The books ________ to the library are put back on the shelves immediately.

A. returning
B. returned
C. which returned
D. having returned