Ⅰ. 单项选择(30分)
( )1. (2012·河南中考)—Have you heard of Earth Day?
—Yes. The first Earth Day_____in 1970 to educate us to protect our planet.
A. celebrates B. celebrated
C. is celebrated D. was celebrated
( )2. By the time we got home, the rain _____.
A. started B. has started C. had started
( )3. My grandmother is so forgetful that she often _____ the key in her room.
A. forgets B. leaves C. forgets to
