Ⅰ. 单项选择填空(30分)
( )1. Telephones_______ in 1876, much earlier than computers.
A. invented
B. are invented
C. were invented
( )2. By the time we got home, the rain _______.
A. started B. would start
C. had started
( )3. My grandmother is so forgetful that she often _______ the key in her room.
A. forgets B. leaves
C. forgets to