3．Soil is made up of a number of layers，each ________ its own distinctive colour and texture.

A．has　 　　　B．to have　 　　　C．has had　 　　　D．having

解析：考查独立结构。分析句子结构可知，逗号后的部分不是一个独立的句子，应选用独立结构形式，故排除A、C项；不定式侧重于将来的动作，不符合句意，故答案为D项。

答案：D

2．-Can I take my car now?

-Oh，sorry.It ________ and won’t be ready in two hours.

A．has been repaired　 　　　　　　　　　　　B．was repaired

C．is being repaired　 　　　　　　　　　　　D．has repaired

解析：句意：--我可以取我的车吗？--对不起，还在修，还要两个小时才能好。repair和car之间构成逻辑上的动宾关系，应该使用被动语态；又车还没修好，正在修理之中，故用进行时。

答案：C

1．The students ________ in Russian are watching a video in the hall to practice their listening ability.

A．are majoring　 　　B．majoring　 　　C．major　 　　D．having majored

解析：句意：那些俄语专业生在大厅里看录像练习听力。此处majoring...是现在分词短语作定语，修饰the students，相当于 “The students who major...”。

答案：B

4．They risked losing everything to save her.

3．I am not familiar with what you have said.

2．She stood there，staring at her mother.

4．他们冒着失去一切的危险去救她。(risk doing)

________________________________________________________________________

答案：1.We have already got used to getting up early.

3．我不熟悉你所讲的内容。(be familiar with)

________________________________________________________________________

2．她站在那里注视着自己的母亲。(stare at)

________________________________________________________________________

1．我们已经习惯早起(get used to)

________________________________________________________________________