【题目】The truth was________when he admitted he had been there all the time.
A.cleared out
B.cleared away
C.cleared up
D.cleared off

【答案】C
【解析】句意：当他承认他一直在那儿时，真相大白了。clear out“除掉(不必要的东西)”；clear away“收拾”；clear up“消除(误会、疑问等)”；clear off“匆忙走开”。