it's（带撇号）只能用作itis的缩约形式。"It's" (with an apostrophe) should be used only as a contraction for "it is".用句后括号中的词或词组来回答问题, 注意撇号的位置.Answer these questions, using the words in parentheses. Put the apostrophe in the ri...
The book is a select collection of poetry from various authors.这本书是各家诗作的集锦。The authors argue cogently that it is high time the church lost its obsession with the subject.作者提出充分的理由说明教会应立刻停止对这个问题纠缠不放。The authors briefly re...
She's a victim of the dreaded hay fever...她患上了花粉热这种讨厌的病症。Inarticulate and rather shy, he had always dreaded speaking in public...他不善言辞又相当害羞,一直害怕在公共场合讲话。No one knew how to treat this dreaded disease.没人知道如何治疗这种可怕的疾病。T...
染色体也决定动物的性别.Chromosomes also determine the sex of animals.四种染色体的每一种都沿着纵向分裂.Each of four chromosomes divide longitudinally.利用显微镜检查细胞染色体可以发现胎儿的性别。Microscopic examination of a cell's chromo-somes can reveal the sex of ...