4．到达目的地时，我们又累又饿。

　　We reached our destination, tired and hungry.

　　5．没有好的设备，我们就不可能做得很好。

　　Without good equipment, we couldn't have done it well.

　　Ⅲ.阅读理解

　　A

　　(2015·江淮十校联考)Older fathers have uglier children, researchers have claimed after linking age to genetic mutations(变异)．

　　The finding comes weeks after leading scientists reported children born to men over the age of 45 run a higher risk of having autism and mental disorders.

　　With age, sperm(精子)­producing cells do not copy a man's DNA as effectively, leading to genetic mutations.

　　Martin Fielder, an anthropologist(人类学家) at Vienna University, told the Sunday Times: Every 16 years the mutation rate doubles. Other researchers found 25 mutations per sperm in a 20­year­old, but at age 40 it is 65 mutations. By 56, it doubles again.

　　The effect is very visible—someone born to a father of 22 is already 5­10 per cent more attractive than those with a 40­year­old father and the difference grows with the age gap.

　　In contrast, women pass on a maximum of 15 mutations to their baby, regardless of age, according to the study published in the journal Nature.

　　Surveying a group of six men and six women, researchers showed them each 4,018 photographs of 18­20­year­old men and 4,416 of women the same age, and asked to assess their attractiveness.

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