of

Question 1

all/most/some/… of cities OR all cities?

Answer 1

most/some/… + noun (without of)

Question 2

some of the cars OR some the cars

Answer 2

most
Some
Any
No
+ of the/this/my

Question 3

all of the cars
Or
all the cars

Answer 3

Both are true.

Question 4

all of it
Or
all it

Answer 4

all/most/some/any/noun of it/us/…

Question 5

no of
OR
None of

Answer 5

Noun of

Question 6

For thing, place, … possession we use

Answer 6

of
the roof of the house

Question 7

he is afraid … the dogs

Answer 7

of

Question 8

he is angry … Ali.
he is angry … Ali’s late.

Answer 8

with
about

Question 9

lisa is different … her sister.
from or to

Answer 9

both are true

Question 10

you are good … math
on in at ?

Answer 10

at

Question 11

I’m interested … sport
to in at?

Answer 11

in

Question 12

I’m married … a dentist.
with by to ?

Answer 12

to

Question 13

kind … you to help us
He is nice/kind … me
with to for …

Answer 13

of
to

Question 14

I’m sorry … that.
I’m sorry … phoning you.
I feel sorry … them.

Answer 14

about -a situation
about/for -doing something
for -somebody

Question 15

which form of verb comes after preposition

Answer 15

After a preposition, a verb ends in -ing

Question 16

She is very good … language.
in on etc

Answer 16

at

Question 17

He asked me … money.
preposition

Answer 17

for
ask (somebody) for

Question 18

what’s happen … you
for to

Answer 18

to

Question 19

Speak … Ali … the problem

Answer 19

to about

Question 20

He never thinks… other people.

Answer 20

about and of are true

Question 21

I’m tired … waiting.

Answer 21

of