F．ly ash can partly take the place of ______.

A． paving material

B． cement

C． concrete

D． the coal by-product

[单选题]__________ can fly very high in __________ sky.A.The birds ... theB.The bir

[单选题]The green kite can fly______than that red one．A．hightB．fastC．higherD．as hight

[单选题]Which of the following may take place if the clearance of the main bearings are excessive?（）A . bearing knocksB . dropping of pressure of LOC . noisesD . all the above

[单选题]Which of the following will take place if the clearance of the main bearings are excessive?（）A . bearing knocksB . dropping of pressure of LOC . noisesD . all the above

[单选题]Must I take a taxi? - No, you ________ . You can take my car.A.had better t

[主观题]Students can’t take magazines out of the reading room without permission.(改为被动语态)Magazines can’t ________ ________ out of the reading room without permission.

[单选题]A．Where in the world can you take an hour's train ride，and pass a forest，a London street，a scene from the Wild West(西大荒)，and a burning building that never burns down? There's only one place，and that's Hollywood，in California． The scenes you see fr

[单选题]We shall take thetreasure away to a [safe] place.A.cleanB. prettyC. distant

[单选题]13． Either of them can take this job，but I wonder who does everything _________ ．A． the most carefulB． more carefuC． most carefullyD． more carefully

[单选题]Must I take a taxi? No, you _______. You can take a car.A.had better to.B.d