After being discovered by Dutch explorers in 1606，the eastern half of Australia  by the British in 1770．

In almost all the colleges in our country now, college students sometimes earn enough money by ______ of part time job to support themselves.

Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known. 

I can’t spend _____ money on the car which is _____ expensive for me.

Some students have trouble _______grammar while others have difficulty      —___ new words.