The newly installed alarm system, which is directly connected to the -考呗网题库移动版

单选题 The newly installed alarm system, which is directly connected to the police, will go off if the correct security code is not entered__________ 60 seconds of touching the keypad.

A．only
B．under
C．within
D．directly

参考答案C

解析:【答案】C。解析：备选答案为副词和介词。首先应分析句子结构，判断横线处应填入介词还是副词。乍一看应填入副词修饰被动结构“is not entered”，实际上if从句是被动语态，“________60 seconds of touching the keypad”应作状语。因此横线处应填入介词，从而构成介宾短语作状语。

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单选题 The airline requested a__________call to ensure a seat on my flight back home.

A．confirm
B．confirmed
C．confirming
D．confirmation

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单选题If the task is too complicated to figure out on__________ own, please don't hesitate to ask one of our representatives, who are here to help.

A．you
B．your
C．yours
D．yourself

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单选题 The hard work put in during his younger years made him become __________sound in his later years.

A．finance
B．finances
C．financial
D．financially

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