31. We should think of ways to stop the waste from the factory _____ our living environment. 

.Would you please ___ this form to see if I’ve filled it in right? 

Exercising regularly can not only ____one’s strength, but also develop one’s character.

He is always telling lies. Don’t be __________ by his sweet words.

At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.