5.14 The company had about 20 notebook computers, but only one-third ()used regularly.

1.33.

4.13I’ll never forget the day ()I became a doctor.

2.21。The tallest building in America’s capital city is the Washington Monument(纪念碑).It is( 21 )for George Washington, the first president of the United States. He( 22 )the American colonies (殖民地)in the War of Independence (独立)against England from 1775 to 1783. As president, he( 23 )the new United States of America through its first difficult( 24 ).
The monument is one of the most popular (25) in the world. Lights shine on it at night. It can usually be( 26 )from far away.

5.29.

3.20 The baby usually ()three times a night.

5.22.

2.16分析本文,找出能代表本文中心意思的一句。(5分)

1.18 Don’t throw that cloth away; and you’ll find a ()for it one day.

1.30. A. hold B. reduce C. provide D. catch