40. he was about to tell me the secret __________ someone patted him one shoulder.
a. as b. until
c. while d. when
答：d。when就在那时．如：i was walking down the street when i heard my name called! 我正在沿街走时听到有人叫我的名字。
41. sally worked late in the evening to finish her report _________her boss could read it first thing next morning.
a. so that b. because
c. before d. or else
答：a。在这里sothat引导的是目的状语从句。so that引导的从句中若没有情态动词will, would, may, might, can, could等词，so that从句就是结果状语从句。如：started out very early so that ! caught the first train. 我很早就出发了，结果我赶上了第一班列车。or else否则。
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