问题补充：
When we get knocked down, we get back up and we come back stronger, and, I’m President, that’s what we’ll keep doing.
A. even though
B. as if
C. now that
D. as long as
答案：
A. even though
B. as if
C. now that
(答案→)D. as long as
解析：连词辨析。A即使，尽管；B似乎，好像；C既然；D只要；句意：当我们被撞倒，我们会站起来会更大强大，只要我是总统，他就是我们一直在做的事情。As long as表示条件。故D正确。
