內(nèi)容導(dǎo)讀：
Lesson 12
Let’s Go the Farthest！
Fill in the blanks with proper prepositions：
______ average， a blue whale weighs more than 26 tons.
Jim is the tallest ______ all the boys.
A cheetah can run one hundred kilometres ______ hour.
The largest blue whale ______ record weighed 212 tons.
The giant tortoise lives the longest of all animals， _________ humans.
Please don’t be late _______ school next time.
___ seven hours and 57 minutes， you’ll be the champion.
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