When the fire broke out, Mary didn"t know ___.A．what to doB．what doC．to do whatD

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When the fire broke out, Mary didn"t know ___.

A．what to do

B．what do

C．to do what

D．what thing to do

答案

解析

Mary didn"t know what to do意为: Mary不知道该做些什么? what to do作know的宾语.

举一反三

I’ve got a habit of ___ up early every morning.

A．get

B．to get

C．got

D．getting

题型：不详难度：| 查看答案

___ is ____

A．Seeing… believing

B．Seeing…to believe

C．To see…believing

D．To see…believe

题型：不详难度：| 查看答案

I prefer ___ to ___.

A．do; talk

B．doing; talking

C．do; talking

D．doing; talk

题型：不详难度：| 查看答案

We suggested ___ trees at the weekend.

A．planted

B．plant

C．to plant

D．planting

题型：不详难度：| 查看答案

Is there enough time ___ now? Yes, take it easy.

A．leaving

B．being left

C．left

D．having been left

题型：不详难度：| 查看答案