It’s___(reasonable)to expect people to work more than 60 hours a week.

If you have the right___(equip) ，you won’t find the job difficult.

若一元二次方程 x^2 +4x+c=0有两个不相等的实数根， 则c的值可以是(写出一个即可) .

This essay is still too long.I’ll have to___(short)it by one or two pages.

Now that you know all the facts ，you can make an informed___(choose).

分解因式： x^2﹣y^2﹣3x﹣3y=__________ .

This advertisement is a___(type)example of their marketing strategy.

代数式√9-x有意义时，实数x的取值范围是 __________.

√4的算术平方根为_________。

__________，塞上燕脂凝夜紫。(李贺《雁门太守行》)