Question

EXERCISE
1. Insert 'since' or 'for'.
(a) What have you been____ doing yesterday?
(b) She has been living here_____ the last seven years.
(c) There hasn't been a famine in this country______ centuries.
(d) I have been teaching in the school____ 1990.​

Answer 1

Answer:

a) since

b) for

c) for

d) since

Answer 2

(A)since
(B)for
(C) for
(D) since