【听听测测】Model Test 74

（单词翻译）

 Boys just____ for the____ of it but girls will not waste___ on competition unless it pays. A Canadian study has___. Rose and Roy from the Gill University in Montreal and her colleagues got forty groups of four boys and four girls aged¹ five to six or nine to ten to play two____ designed games. In one for __, the children had to____ beads³ on sticks until they are full, taking the beads from___ a common pot or another player. One set of____ meant that everyone would___ win. So competition was_____. Another set of rules_____ for only one winner. So competing makes____. The girls spent more time watching the____ of their competitors and_____ to them. They would_____ watch the facial_____ of their____ as they decided⁴ whether or not to take the bead². Sometimes they will decide not to , says Roy and the older girls wasted no time on competition____ when it paid off.