Do let your mother know all the truth; she appears everything.A. to tellB. to be toldC. t

Do let your mother know all the truth; she appears everything.
A. to tell
B. to be told
C. to be telling
D. to have been told

A. to tellB. to be toldC. to be telling(答案→)D. to have been told解析：本题考查不定时的用法。分析第一句可知，she 与tell 之间存在被动关系，故排除A、C两项；由两句之间的逻辑可知，母亲已知一切，再隐瞒是没有用的，故一定要告诉母亲一切真相。所以选D。B表示将要被告知，不合题意。

我明天再问问老师，叫他解释下这个问题