解答 答案：D 根据题干There is _______"s"and _______"u"in the word"use"结合语境可知此句意为：在"use"一词中有一个"S"和一个"U"，都表泛指，应用不定冠词a或an；根据s的首音素为/e/是元音音素，故用an；根据u的首音素为/ju/是辅音音素，故用a．综上所述，故选D
18．听第六段材料，回答第21至第25小题 21．Who gave Tom one dollar at first？ A．His mother． B．His father． C．The old man． 22．What happened when Tom went to buy a toy？ A．James was hit badly by snowballs． B．Tom met an old man and helped him． C．Tom broke a window of the house． 23．Why did Tom go back to the house？ A．To play snowballs again B．To get his toy back C．To pay for the window 24．How much money did Tom get at last？ A．Two dollars． B．One dollar． C．Nothing． 25．What does the story want to tell us？ A．Working hard is very important． B．Helping others is to help ourselves． C．Being honest can bring us more．
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