（ ）你向你的妈妈介绍你的同学Sarah时，你说：
A . Hello, Sarah.
B. Hello, I’m Sarah.
C . This is Sarah.
Bryan is very________. He wants some water.
A.hungry
B.thirsty
C.tired
A cat is running after a mouse. The cat is _________ the mouse.
A.in front of
B.behind
C.in
How much ______ a packet of sweets?
A.is
B.are
C.has
Christmas comes in ________ in Australia.
A.December
B.September
C.October
A: What ___your uncle_____? B: He is a firefighter.
A.do do
B.does do
C.does does