You must try your best to stop him ______ (make)the same mistake again．

单项选择题He wrote the book The Cat in the Hat at the age of ______.

填空题year→years

填空题The law of gravity ______ (discover)by Isaac Newton about 350 years ago．

单项选择题______, so she was surprised.

单项选择题Why could the man become one of the biggest food retailers in the US

单项选择题How old was Marie when she became unable to speak ( )

单项选择题Ⅱ. 完形填空 Cloze

单项选择题Which fact does the passage provide ( )

填空题If those wild animals can’t find enough food, they ______ (die)or have to leave their habitat soon．

单项选择题People like his books because the books ______.