Solve this:
7.a. know
b. are
c.has
d. has led
e. discovered
f. is
8. a. has brought
b. has fulfilled
c. were
d. are
e. has
f. get
9.a. was sitting
b. came
c. doing
d. died
e.was
f. am
b. are
c.has
d. has led
e. discovered
f. is
8. a. has brought
b. has fulfilled
c. were
d. are
e. has
f. get
9.a. was sitting
b. came
c. doing
d. died
e.was
f. am