(   ) 2.―Will you       come to my birthday party on Sunday?

      ——Sure. I'm glad I am invited.
A.can    B.could

C. are able to    D. be able to

2. D be able to可用于多種時(shí)態(tài)；can只能用于一般現(xiàn)在時(shí)和一般過去時(shí)。

題目來源：仁愛英語同步練習(xí)冊(cè)九年級(jí)上冊(cè)下冊(cè)合訂本 > Topic2 I'm excited about the things that will be discovered in the future.

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