Read the passage and choose the best answer to the question.

AN EXCITING TRIP

I have just received a letter from my brother, Tim. He is in Australia. He has been there for six months. Tim is an engineer. He is working for a big firm and he has already visited a great number of different places in Australia. He has just bought an Australian car and has gone to Alice Springs, a small town in the center of Australia. He will soon visit Darwin. From there he will fly to Perth. My brother has never been abroad before, so he is finding this trip very exciting.

Why is Tim finding the trip very exciting?

A. Because he has visited a great number of different places in Australia

B. Because he has just bought an Australian car on the trip

C. Because he can fly to Perth

D. Because it is the first time he has been abroad

Giá trị nhỏ nhất của biểu thức A = 2 x 2 - 4 x + 5  là ?

A. 3        

B. 1        

C.  3    

D.  2