7.was done　考查动词的时态和语态。由后面的left可知，此处应用一般过去时，又因do和everything是动宾关系，故填was done。

　　8.Barbers　考查语境理解。由“I am here, and I am a barber...”可知填Barbers。

　　9.worked　考查动词的时态和语态。“我”刚刚给你理了头发。此处是描述过去发生的事，故应用一般过去时。I与work为主谓关系，故填worked。

　　10.if　考查连词。if引导条件状语从句，意为“如果”。

　　五、阅读理解

　　(2015·四川卷)

　　Their cheery song brightens many a winter's day. But robins are in danger of wearing themselves out by singing too much. Robins are singing all night—as well as during the day, British­based researchers say.

　　David Dominoni, of Glasgow University, said that light from street lamps, takeaway signs and homes is affecting the birds' biological clocks, leading to them being wide awake when they should be asleep.

　　Dr Dominoni, who is putting cameras inside nesting boxes to track sleeping patterns, said lack of sleep could put the birds' health at risk. His study shows that when robins are exposed to light at night in the lab, it leads to some genes being active at the wrong time of day. And the more birds are exposed to light, the more active they are at night.

　　He told people at a conference, “There have been a couple of studies suggesting they are increasing their song output at night and during the day they are still singing. Singing is a costly behaviour and it takes energy. So by increasing their song output, there might be some costs of energy.”

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