----I wonder why Mary is so unfriendly to us.

----She is _____ than unfriendly, I’m afraid.

A. shyer        B. much shyer     C. shy more       D. more shy

The first textbooks _____for teaching English as a foreign language came out in the 16th century.

      A. having  written   B. to be written   C. being written   D. written  

Most air pollution is caused by the burning of _________ like coal, gas and oil.

A. fuels   B. articles

C. goods  D. products

— __________ when has the country been open to international trade?

— 1978, I suppose.

A. Since  B. In

C. From  D. After

—— Excuse me, is this Mr. Brown’s office?

—— I’m sorry, but Mr. Brown＿＿＿works here.He left about three weeks ago.

A. not now     B. no more  C not still     D. no longer

Don’t worry too much about ___ mistakes.They ae ___ natural part of learning.

     A. the, a    B./, a     C.the,/     D.the, the 

Some doctors were sent t?the front where medical workers were ＿＿＿.

A. in great need     B. in great need of  . needed great     D. needed in

It was＿＿＿＿＿late to catch a bus after the party, there fore we called a taxi.

A. too very     B.much too  C. too much     D. far

The boy wrote＿＿＿＿＿last week．

A．a two-thousand-words article

B．two two-thousand-words article

C．a two-thousand-word article

D．two two-thousand-words articles

 30These tables and desks are all made of＿＿＿＿＿．

A．a wood B．some wood C．the wood D．wood