Paper money was in ________ use in China when Marco Polo visited the country in ________ thirteenth century.

A. the; /

B. the; the

C. /; the

D. /; /

________ wheel is thought to be ________ invention of ________ first importance in human history.

A. A; the; the

B. The; an; the

C. A; an; the

D. A; an; /

Towards ________ evening, ________ cold rain began to fall.

A. an; the

B. the; a

C. the; /

D. /; a

—What about ________ book?

—It's too difficult ________ book for me to understand.

A. a; a

B. a; the

C. the; the

D. the; a

Many people agree that ________ knowledge of English is a must in ________ international trade today.

A. a; /

B. the; an

C. the; the

D. /; the

________ terrible weather we've been having these days!

A. How a

B. What a

C. How

D. What

Wouldn't it be ________ wonderful world if all nations lived in ________ peace with one another?

A. a; /

B. the; /

C. a; the

D. the; the

She is ________ newcomer to ________ chemistry but she has already made some important discoveries.

A. the; the

B. the; a

C. a; /

D. a; the

The warmth of ________ sweater will of course be determined by the sort of ________ wool used.

A. the; the

B. the; /

C. /; the

D. /; /

Kate and her sister went on holiday with a cousin of  ________.

A. their

B. theirs

C. her

D. hers