Fill in the gaps with "it is" or "there is/are" in the appropriate form.
a._______ a rather hard question  to answer.
b.______many things to do before the trip.
c._______no use to tell him the truth now.
d._______Robert who congratulated me first.
e._____impossible to work with him,he always finds faults with everyone.
f.______a person waiting for you in the hall.
h._____a pity you cant come to me now.
i_______too little time left to change the situation .
j.______not any schoolboys in the yard.