We tried to ring you back，Bryan, but we think we your number incorrectly.
Alooked up
Bgot through
Ctook down
Dworked out
网友回答
A. looked up
B. got through
(答案→)C. took down
D. worked out
解析：句意，Bryan，我们设法给你回电话，但是我们认为我们记下的你的电话号码不正确。look up 查出 get through 穿过 take down 记下 work out 解决，根据题意，故选C。