As the pistons ________ forced up and down, they rotate ...

[ Subject and Verb Agreement ]

As the pistons ________ forced up and down, they rotate the crankshaft.

A. is

B. are

Select your answer:
A B C D E

Other quiz:

Grammar › View

Choose the question which is correct.

A. Do you any children?

B. Do you have any children?

C. Are you have any children?

D. Are you any children?

Grammar › View

When_____ Shakespeare _______? In 1564.

a) were/born

b) is/born

c) was/born