Checking your answers before handing in your paper can help you mistakes.

s population is expected toincrease to about 1.5 billion in 2040, _____ it will start to decline slowly.

People who live in a small village arebound to see a good _____ of each other.

If no one ________ the lost bag，the person who found it can give it to the Lost and Found Department.[ ]

I can’t remember _____ made the teacher give Mary the permission to leave the class earlier.