(   )1.There is _____“u” and ______“s” in the word “bus”

   A. an; an B. a; an C. an; a D. a; a

(   )2.There are many _______ on the big tree.

  A. leaf B. leaves C.a leaf D. leafs

(   )3.What’s your father’s ______.He is a doctor.

A. work B. job C. like D. do

(   )4.Can you teach ______ to play football?

 A. they B. them C. their D.theirs