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【題目】A huge amount of oil was spilt on the East Sea，the causes of ________ are still under investigation．

【題目】Either you or one of your assistants _________ to attend the meeting that is due tomorrow.

【題目】Unfortunately，_____ stone hit him on ______ head and he got injured.

【題目】Little _________ that he was seriously ill himself.

【題目】______he does has nothing to do with me.

【題目】I fell asleep while working on this paper ______ the computer on．

【題目】--How do you usually go to work? –– I usually drive, but if it is fine, I ______ by bike.

【題目】What does the man think of the film?

【題目】He was unable to ________ to the students what he meant.

【題目】What are the speakers mainly talking about?