單項(xiàng)選擇題In some parks visitors are requested to keep（）the grass.

A.aside
B.away
C.out 
D.off


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1.單項(xiàng)選擇題In order to（）your goals, you must work hard.

A.make
B.achieve   
C.require
D.develop

3.單項(xiàng)選擇題If you observe more closely, Margaret is（）of the two girls.

A.the taller  
B.taller  
C.the tallest
D.tallest

4.單項(xiàng)選擇題If you need me, just let me know. I will（）

A.that's all right
B.thank you 
C.all right
D.not at all

5.單項(xiàng)選擇題If you（）your work, you can go there first.

A.will finish 
B.finished
C.finishing 
D.have finished