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1.He won by ______ because his opponent refused to play.
A.defect B.default C.deficit D.refusal
2.It ______ me to see him in such a bad health. He was such an energetic and strong young man only several months ago.
A.depressed B.upset C.harmed D.grieved
3.The waste pipe is blocked; try ______ it out with hot water, or just call the plumber to do it.
A.blushing B.crushing C.brushing D.flushing
4.Experts suggest that speech stages are reached in fixed sequence and at a constant age, but there are cases where speech has started late in a child who ______ turns out to be of high IQ.
A.eventually B.automatically C.decidedly D.inversely
5.She was so ______ in her work that she didn't notice me when I came in the room.
A.suffocated B.dipped C.immersed D.submerged