The modern telephone is the result of work __________ many people. *
A.at
B.in
C.of
D.on
9. The telephone was instrumental __________ modernization. *
A.below
B.to
C.under
D.with 10. Telecommunication of the 21st century has been dominated ______ the development of the smartphone. *
A.for
B.until
C.by
D.during 11. A small stream runs __________ the bridge. *
at
over
across
12. Father worked _______ twenty years. 
on
for
at
once
13. We went _________ the shop to buy some stuffs. *
up
into
above
through
14. We got _______ the train at the next stop. *
in
of
off
over
15. He puts his hands ____________ his back. *
under
above
through
behind
16. Our teachers are hosting a meeting ____________________. *
at the park
in the library
beside the room
within the year
17. My family and I enjoy walking ___________________ with our dogs. *
in the river
at the kitchen
under the sea
through the woods
18. I saw the cat ____________________. *
over the fence
under the table
below the street
along the road
19. She put her shoes _________________ because they were muddy. *
in the ground
inside the store
by the wall
by the back of the door
20. The students write all ______________ in their notebooks. *
of the answers
for the answers
off the answers
from the answers ​