18. they a lot of problems since they have moved to the usa.
a. have
b. have had
c. are having
19. john is here. he
a. has just come.
b. is coming
c. just came.
20. i can't climb the wall because a ladder.
a. am not having
b. haven't got
c. don't have got
ответ: 18) а?, 19)а?, 20)а?