【C16】A．opportunityB．carelessnessC．accidentD．hand

A．ignoranceB．carelessnessC．unconsciousnessD．innocence

【C2】A．opportunityB．chanceC．likelyD．occur

When you vacate the room, you should ______ the door key to me.A．hand inB．hand outC．hand d

【C20】A．handed outB．handed overC．handed inD．handed down

You will be informed about any subtle changes ________ .A at the first opportunityB for

【C8】A．handed overB．handed outC．handed aroundD．handed in