It'snineo'clockinthemorning.TheteacherpromosedthattheyshouldgetatonceAstartingB.startCtostartD.started答案及选择的原因最好能够提供相关的语法知识.

Question

It's nine o'clock in the morning.The teacher promosed that they should get_at once
A starting B.start C to start D.started
答案及选择的原因
最好能够提供相关的语法知识.

Answer 1

选D,get started
get ,可以做连系动词,用来代替be ,可以用于“get+过去分词或形容词结构”,表示动作.例如下面这些：
表示系表结构的“get+形容词”：
get warm,get cold,get angry,get fat,get ill
表示系表结构或被动语态的“get+过去分词”：
get married,get excited,get used to,get lost,get bored,get tired,get drunk,get dressed
get started,get tested,get hurt,get changed,get separated,get caught,get paid,get broken 等.
例如：
Cleaning women in big cities usually 【get paid 】by the hour.
大城市里的清洁女工通常按小时计报酬.