1. —Look! The telephone is broken. Someone damaged it _____ purpose.
—That may be right. But perhaps it was broken _____ accident.
A. on; on B. on; by C. by; by D. by; on
2. As little Tom didn’t want his sister to share his chocolate he ______ somewhere in his room.
A. put it away B. sent it away C. hid it away D. took it away
3. Many countries are increasing their use of natural gas, wind and other forms of _____ .
A. energy B. source C. power D. material
