The newly installed alarm system, which is directly connected to the police, will go off if the correct security code is not ent

admin2015-10-14  15

问题 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.

选项 A、only
B、under
C、within
D、directly

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 thekeypad”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。
转载请注明原文地址:https://kaotiyun.com/show/QLMc777K
0

最新回复(0)