Everyone should learn something about first aid, because every second   in an emergency.

If the students don’t understand what their teacher is talking about, he/she hasn’t       _________his/her meaning_____________.

We’ll take a honeymoon trip to Venice. Would you like to _________ my dog for me while we’re away?

Driving on the road, drivers do ______ the traffic rules, which is responsible for themselvesas well as others.

We found ___ for us to finish the work within two days.