Mary said (that), "Loud and annoying sounds from innumerable vehicles in the highway nearby cause noise pollution."
A.
B.
C.
D.

Tony said (that), "The disposal of untreated sewage in rivers and oceans leads to water pollution."
A.
B.
C.
D.

Peter said (that), "Intensive insecticide and pesticide sprays in agriculture make the soil contaminated."
A.
B.
C.
D.

Mai said (that), "The burning of fossil fuels leads to air pollution."
A.
B.
C.
D.

Nam said (that), "The environment is severely affected by pollution."
A.
B.
C.
D.

An e-book is an electronic book. It can be read on a mobile device.
An e-book is.................................................................................. 
A.
B.
C.
D.

Do you know the name of the man? His laptop was broken.
Do you............................................................................................ 
A.
B.
C.
D.

This tablet is mine. Its screen has been scratched.
This tablet...................................................................................... 
A.
B.
C.
D.

The article is about smartphones. They have become excellent study tools.
The article is.................................................................................. 
A.
B.
C.
D.

A computer technician served us. He was very nice.
A computer technician................................................................... 
A.
B.
C.
D.