1. The river is rich ... fish.
a) of
b) on
c) for
d) with?
2. If i ... you, i would probably do it.
a) am
b) was
c) were
3. Who ... it to you?
a) explain
b) explained
c) do explain
4. ... he go to school yesterday?
a) does ?
b) did
c) is
5. It ... rain today, though the sun is shining now.
a) must
b) can
c) may
d) could
e) have to