( ) Those are________.
A. apple treeB. apple trees C.apples trees
That______you_______?
I’m eating lunch
A. do do B.do doing C .are doing
The elephant_________walking and the monkeys______swimming.
A.is are B.is is C .are are
Can ducks______?
A.swim, swimming B.swim swim C .swimming swimming
A:Hello,_______Mike.Can I speak to Tom?
B:Sure, hold on ,please.
A.I am B.this is C .that is
Zhang peng’s sister is writing _______e—mail.
A.a B.an C .\