Question

The Passive
7. ____ all the exercises ____.
a. is/ doing
b. are/doing
c. are/done
8. ___ all your books ______?
a. is/closing
b. are/closed
c. was/closed
9. The houses ____ a hundred years ago.
a. was builded
b. were built
c. weren't builded
10. America ___ by Columbus in 1492.
a. is discovered
b. was discovered
c. was discovering
11. When ______ the telephone
a. was/invented
b. is/invented
c. wasn'tinvented
12. Where ____ the cars ___?
a. was/parking
b. were/parking
c. were/parked
Помогите!!​

Answer 1

Maybe...
7.c
8.b
9.b
10.b
11.a
12.c