Breakfast is the first ______ of the day.
A. food
B. dinner
C. lunch
D. meal
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Only after I had reached the airport ______ that I had forgotten to take my ticket with me.
A. I realized
B. have I realized
C. did I realize
D. I had realized
Recently he ______ every night until after one o’clock, preparing for the final exam.
A. shows up
B. show off
C. stays in
D. stays up
Mr. Allen said that he did not want to ______ any further responsibilities.
A. take on
B. put on
C. get on
D. look up
赤潮是海水富营养化的结果。( )
A. 对
B. 错