The use of credit cards in place of cash ________ increased rapidly in recent years.

A. to have B. have C. has D. having

Some of the milk I bought last night ........... not fresh anymore.

A. is B. is being C. are D. are

Either John or his wife .........breakfast each morning.

A. make B. is making C. makes D. made

Bread and butter .......... what she asks for

A. is B. are C. will be D. have been

A large number of students in this school.......... English quite fluently

A. speaks B. is speaking C. has spoken D. speak

Working in the factory ........... not what children should do

A. be B. is C. are D. have been

Not only the air but also the oceans ........... been polluted seriously.

A. have B. has C. is having D. are having

The number of students in this class ............. limited to thirty.

A. be B. are C. is D. am

The quality of these recordings __________ not very good.

A. be B. are C. am D. is

There are small............................between British and American English.

A. differences B. difference C. differently D. different