阅读理解。

     High school students in America hear about twenty bells every day. The first bell is the tardy bell(上课铃) .If students are not in their seats when the tardy bell rings,they know they are late. Another bell rings at the end of each class,and everyone leaves class quickly and goes to the next class. When students are in a hard class,they are often happy to hear the bell ring. If the class is interesting(右趣的) ,they do not want

the bell to ring.Most students like the lunch bell best. They know that it is time to join(参加) their friends

for lunch. They buy a hot meal in the school dining hall or they bring their lunch from home in a big paper

bag, After a nice lunch,everyone knows that it is soon time for another bell,another bell,another bell.

1. American students in high school hear about               bells every day.

A. many

B. twenty

C. twelve

D. much

2. The students know they are late if they               .

A. don't come to school early

B. are not in their seats when they hear the first bell

C. hear another bell in the classroom

D. are in their seats before the first bell rings

3. The students are happy to have               .

A. interesting classes

B. a hard class

C. all the classes

D. a difficult class

4. Why do most students like the lunch bell best? Because               .

A. they don't like their classes at all

B. they can enjoy（享用）their meals

C. they can join their friends for lunch

D. they can have a lot of food to eat

5. The students usually have their lunch                 .

A. at school

B. in the restaurant

C. at home

D. at the party