You spent 300 yuan on a pair of cotton gloves. Such a pair of cotton gloves _____be worth so much.

I didn’t pass the Maths exam last time. I’m so worried about it.— harder, you will make much progress .

The teacher always tells us to stay ________ and obey the guidance if we hear the fire alarm.

There was ____ to prevent theaccident

mes people just believe what they see, ______the reality may be different.