The ________ of the island was quite an event in the world.
| A．discover | B．discovery | C．discovered | D．discoveries |
Many factories poured out dirty water and polluted the Pearl River.
A. made ... clean
B. made ... full
C. made ... dirty
Timmy is good at designing 3D computer games.
A. does well in
B. learns about
C. Enjoys
They enjoy themselves at school every day.
A. are not happy
B. have a good time
C. are busy
It took the students two hours to complete the test paper.
A. endB. make C. finish
My classmates are all friendly to me.
A. happyB. badC. kind