问题
选择题
——Tomorrow ____ my birthday. I’d like you and Jane to come.
——I’m not sure if she ____ free.
A．will be; is
B．is going to; is
C．is; is
D．is; will be
答案
答案：D
第一空是表示“不以人的意志为转移的客观事实”，用一般现在时；第二空是表示“将来的动作”，用一般将来时。