2019年mpacc考试英语真题——介词和介词短语244

{01}She dedicates herself to her work. She is such a dedicated teacher that her efforts will _____
A.pay off
B.be fed on
C.pay back
D.be given back
解析：考查短语辨析。pay off 还清，得到回报，be fed on 以什么为食，pay back 偿还，be given back 归还，句意：她专心于她的工作，她是一个如此专心的老师以至于她的努力会得到回报。所以选A。
本题选A。
{02}Father told me to______the milk unntil it boiled and then turn off the gas.
A.observe
B.watch
C.notice
D.see
解析：考查动词词义辨析。Observe观察；watch观看，留意；notice注意到；see看见
本题选B。