Ⅰ.Choose the best word to complete the sentence.
( )1.—Is Kate’s birthday April 21?
--Yes,it is.
A.in B.at C.on D.of
( )2.How many desks and chairs in your classroom?
A.there are B.are there C.is there D.there is
( )3.Why Jim go to the cinema with you the day before yesterday?
A.does B.didn’t C.wasn’t D.do
( )4.—What’s Helen doing?
--..