Smile to the world， ________the world will smile back to you．（ ）
A．andB．orC．butD．if
Who runs in your class？
Tom does． None of us can catch him in the race．（ ）
A．fasterB．slowerC．fastestD．slowest
The driver be hurt badly in the accident．
That's true． Let's send him to the hospital as soon as possible．（ ）
A．needB．can'tC．mustD．may not
Is Dongjin High﹣speed Railway Station the largest in Hubei Province？
Yes， of course． It's just a little smaller than the largest one in Wuhan．（ ）
A．firstB．secondC．thirdD．fourth
Is this Mike's dictionary？
No， it's mine． The thick one on the desk is ．（ ）
A．hisB．yoursC．hersD．theirs
Your sister your mother very much．
Many people regard them as sisters when they hang out together．（ ）
A．cares forB．takes after
C．helps outD．believes in