有几道英语题拿不准,求指导.1._____ number of teachers in our school is 20

有几道英语题拿不准,求指导.
1._____ number of teachers in our school is 208.________number of them live near the school?
A .the；A B .A；the C .The;The D .A;A
2.Millie has three sisters and they are ____ workers.
A .whole B .total C.both D .all
3.Do you think Halloween ___ interesting festival?
yes.It comes in ____ october and it's my favourite.
A.an;a B.an;/ C.an;the D.the;a
4.there _______ lots of of milk in the bottle.
yes.let's drink______.
A.is;it B.are;them C.is;them D.are;it
5.I feel great when I ______ who the criminals are.
A.look at B.find out C.make out D.get out