51。(when)and (by whom)the islands of the west Indies were first settled is a matter (of debating)(among)archaeologists。/ j2 |; }7 p2 J% v! V
52。(Cliff‘s and Al‘s)car (broke down)again,but (luckily)they knew (how to fix)it。
$ d2 D8 z) t& c* i% r 53。(from the top )of the tower,Jacob was able (to clearly and easily see)the (whole )city (stretching)out below him。3 I, y$ e: ~+ ~8 g# e% I/ G
54。Joan (decided)that she did not like the (girl eating)an ice-cream cone on the bus after (she)(yelled)at her little brother。
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