5．The work took us a week to finish.

→It took us a week to finish the work.

→We spent a week on the work.

→We spent a week(in)finishing the work.

4．Some animals have to accommodate to changes in climate.

3．These reforms will not remove poverty and injustice.

2．We didn’t plan it like that but it worked out very well.

5．我们花了一星期做这项工作。

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答案：1.Mr. Black is my old friend.Our friendship dates from/back to 1985.

4．有些动物不得不适应气候的变化。(accommodate to)

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3．这些改革消除不了贫穷和不公正。(remove)

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2．我们原不是那样计划的，但事情的结果却很好。(work out)

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1．布莱克先生是我的老朋友。我们的友谊始于1985年。(date from/back)

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8．The young must be responsible for their parents and ________ them.

A．provide　 B．provide to　 C．provide for　 D．provide with

解析：句意：“年轻人必须对他们的父母负责并赡养他们。”考查provide for sb.“赡养某人”，故答案是C。

答案：C