This is my school. There are many trees and flowers in it. It’s very beautiful. The teaching building is big and tall. There is a big playground in our school. After 4:30 in the afternoon, many students come to the playground to play football and some students play table tennis in the table tennis room. There are 1,200 students and 25 classes in our school. The students all like to study. The teachers in our school are very good. They help the students to study and the students like them, too.

小题1:The school looks _____.

A．small

B．old

C．nice

D．bad小题2:The school is beautiful because of (因为) ________ in it.

A．trees and flowers

B．a playground

C．students and teachers

D．the table tennis room小题3:There are at least (至少) _____ students in one class.

A．50

B．45

C．75

D．65小题4:After class the students often go to _____.

A．their classroom

B．their homes

C．the playground

D．the teachers’ office小题5:Do the students like to study?

A．Yes,they do.

B．No,they don't.

C．Yes,they are.

D．No,they aren't.

引起溢流的原因很多，其中之一是地层流体的侵入，使钻井液密度（）。

A、增大

B、不变

C、减小

D、以上都不对