sell out 售完(某种货物)，脱销

turn out 结果证明是

run out (of) 用完，耗尽

check out 结账离去，办妥手续离去

give out 分发（试卷等）；发出（光、热等）；用尽；耗完；筋疲力尽

Page No.432

高手过招

用out相关短语的适当形式填空（原创）

①At the end of the race his legs         and he collapsed on the ground.

②It’ s easy to        him        in a crowd because he is very tall.

③His new book will             next month.

④We thought it was going to rain; it           to be a fine day.

⑤We         of/from our hotel at 5 a.m. to catch a 7 a.m. flight.

答案：①gave out②pick; out③come out

④turned out⑤checked out

13. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.

随后它会变成什么没人能知道，直到38~45 亿年前，这团尘埃才慢慢地形成一个固体的球状物。

What it was to become ...是what 引导的主语从句，what 在从句中作become 的宾语。

Page No.433

What surprised everybody was that he didn’t come to the meeting.

使大家惊奇的是他竟没有参加会议。

What he did added to our difficulty.

他所做的增加了我们的困难。

“be+动词不定式”在本句中表示按照计划、安排将要发生的动作。

When are they to hand in their plan?

他们的计划什么时候交上来？

You are to do your homework before you watch TV.

你得做完了作业才能看电视。

联想拓展

“be+to”还可以表示以下含义：

表示可能性，相当于can,主要用于疑问句和否定句。表示命令，意为“必须，不得不”，意思等同于must, have to，表示假设。表示“命运注定……”，通常用于过去时。

How am I to know what has become of him?

我怎么知道他的遭遇如何呢？