Activities of the Science Festival _____ model planes and model rockets are flown over the school grounds include the Inventions Show and the Essay Competition.

It is ________ that he has been addicted to the drugs and has difficulty quitting it[ ]

Nancy is a good student. She studies hard _______ she also likes to help others.

You were stupid to try climbing up there You ______yourself

Can you finish ________ these books before 10 o’clock ——Yes, I can.