You carry your backpack（背包）around every day，to every class，all year long．So it's important that you choose the right one．And the time has come again：Another school year means another backpack to buy．

What's out there this year? Here's a look at three of this year's backpack trends（款式）．

1．You don't have to stay neutral（暗淡的）．There are all kinds of backpacks this year．They have lots of color and loud prints．So forget the basic black and gray（灰色）．Go for a bag that stands out and shows who you are and what you like．

2．Love lots of pockets? You’re in luck．There's a place for everything you might want to carry--your phone，iPod，water bottle．

3．Go earth-friendly．Just like everything else，school bags have gone environment-friendly．You'll find all kinds of bags made of materials that can be used again．

Do you know how to use your backpack correctly? Here are some tips：

1．Don't overload your bag．You shouldn't carry more than 10% of your body weight．

2．Carry it right．You should use both of those straps（带子）．And the bottom of the bag shouldn't be more than 10 cm below your waistline（腰部）．Any lower and it'll you’re your shoulders tired and make you lean（倾斜）forward when you walk．

3．Try to have a place for everything you carry．Make full use of those pockets．They will keep you from losing things．

1．It is important for students to choose the right backpack because _______．

A．a new school year is coming                     B．they carry backpacks very often

C．the school requires them to do so                D．it makes them follow the backpack trend

2．Which of the following is this year's backpack trend?

A．Black and gray backpacks．                     B．Backpacks made of strong materials．

C．Backpacks having many pockets．               D．Big backpacks．

3．A right way to use one's backpack is _______ according to the writer．

A．to keep both the straps on one shoulder

B．to carry as few things as possible

C．to keep the straps less than 10 cm

D．to put different things in different pockets

4．Tom is 50 kilograms so he should carry a backpack which should be no more than _______ kilograms according to the passage．

A．2.5                      B．5                         C．7.5                        D．10

5．The underlined word overload probably means “_______” in Chinese．

A．过分劳累            B．要价过高             C．过度磨损               D．装载过重