3. 2) have been studying/ have not finished
3) have been phoning/ have gone
4) have you heard/ has robbed
5) have broken/ has written
4. b) since
c) been
d) met
e) recently
f) teaching
g) yet
h) has
i) practicing
j) taught
5. b) has gone
c) have been learning
d) haven’t finished
e) just left
