Can you remember the scientist and his theory(理论)        we have learned?

Being blind is something          most people can’t imagine.

When Robinson Crusoe got to the island, the first thing       he did was to look for some food.

Everyone has his aim in life. However, you can’t get fat on one mouthful. Start with the easiest thing        you can control.

—What are you looking for?
—I’m looking for the book        you lent me yesterday.

—Do you like advertisements?
—Yes, but I hate those        are shown on TV many times every day.

—What are you looking for?
—I’m looking for the CD about EXO         I bought yesterday.

Lily doesn’t know how to help the little boy         parents have left their hometown for making money.

—Look! That is the woman         I met yesterday.
—Oh? She’s my aunt.

It’s time to say goodbye to my school. I’ll always remember the people        helped me.