题目内容

The doorthe left side will be used.

A. on
B. in
C. at
D. with

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The door on the left side will be used,Please keep ______of the door.

A. clear
B. on
C. off
D. of

Please get on the train.

A. quickly
B. quick
C. quicker
D. quiet

In the newest lines, some practical devices wereto make subway trips really easy.

A. installed
B. install
C. installation
D. instant

There's no extra charge 30 minutes if you use the public transportation card.

A. small
B. within
C. at
D. on