阅读理解。

     Today is Saturday. The students of Grade Seven go to school early, but they have no classes. Their

teachers are going to take them to the zoo. They take buses there. They get there at 8:30 a.m.

     The zoo is very beautiful. There are many trees, some hills and a big lake. It's spring now, and you can

see many flowers there, too. There are also many people. They like to watch tigers. They have a good time

there. They leave the zoo at 3:30 p.m.

1. The students get to the zoo _____.

A. in the afternoon

B. in the morning

C. at noon

D. in the evening

2. They have no classes because (因为) _____.

A. it's Saturday today.

B. they want to play

C. theirs teachers take them to the zoo.

D. they want to see flowers

3. They stay in the zoo for _____ hours.

A. eight and a half

B. three and a half

C. five

D. seven