问题补充：
–Should I keep what we talked about just now secret from Sofia?
--She is our close friend, and deserves the truth.
A. knowing
B. know
C. to know
D. to be known
答案：
A. knowing
B. know
(答案→)C. to know
D. to be known
解析：考查非谓语动词。deserve to do sth “值得做…、应该”；deserve doing sth “值得被…”。句意：对刚才我们谈论的事情我向索菲亚保密吗？她是我们的亲密的朋友，她应该知道真相。根据语境选C
