—Have you got any plan for the coming summer holidays?—Well，I’m going to a quiet place, especially _____ suitable for relaxing myself.

—Just a minute, Tom. Is this the report you need to hand in today?—Oh, yes, Mum. I thought I had put         in my school bag. Thank you.

 We also had different students in some classes, so ______was a struggle to remember all the faces.

The aged are close companions, and many of       have known each other for decades. 

Helping others is a habit, _____ you can learn even at an early age.