19[A] available[B] reliable[C] identifiable[D] suitable
20[A] similar to[B] such as[C] along with[D] aside from
第17题是考一个搭配be aware of(意识到),因此正确答案是[C] aware。
第19题也是考固定搭配available for(可用于),因此正确答案是[A] available。
第20题也是考固定搭配such as(譬如说;像……那样的)。在这个空的前面提到“不熟悉的和紧急的信号”,后面提到“对烟雾的嗅觉”,这是举一个例子,是前面所说信号的一种。所以,B选项为正确答案。
注意:这个固定搭配在2001年的第31题考过。The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases31 such as the trial of Rosemary West.
例如 1998年第45题
45 contrast , they saw in the preceding hundred years from 1650 to 1750, when England was still a 46 agricultural country, a period of great abundance and prosperity.
45.[A]On[B]With[C]For[D]By
本题考查一个常见的固定搭配:by contrast(相反地)。