当对方在电话时Hello, 你应该这样回答：_____________。
A. Hello, I’m Nina.
B. Hello, this is Nina.
Can pandas swim? Yes, they __________________.
A. can’t B. could C. can
Is he watching ants? No, he__________________.
A. is B. isn’t C. doesn’t
I’m making a birthday cake for ______________family.
A. we B. us C. our
I play football at 3:00__________________the afternoon.
A. on B. for C. in