(用with复合结构改写) to 多维训练 under Guided by a local guide，we visited the famous church. With a local guide guiding us，we visited the famous church. 答案 ③

　　(用独立主格结构改写) ④

　　(用介词短语改写) A local guide guiding us，we visited the famous church. Under the guidance of a local guide，we visited the famous church. 答案

　　switch v. 转变；改变；替换；n.开关；转换 7. 多维训练 (1)According to the air traffic rules，you should

　　your mobile phone before boarding. (2)You drive first and then we’ll

　　. switch off switch over 答案 (3)At first，the speaker was referring to the problem of pollution in the country but halfway in his speech，he suddenly

　　another subject. (4)When a tape is put in the VCR，it

　　automatically. switched to switches on 答案

　　optimistic adj.乐观的；乐观主义的 8. 多维训练 (1)单句语法填空 My good performance in the job interview left me optimistic

　　my future and about

　　I can do here. (2)同义句改写 The experts are optimistic about our success.(改为复合句)

　　about what The experts are optimistic that we will succeed. 答案

　　take up拿起(pick up，lift)；接受(accept)；开始从事；继续(continue)；占用(fill or use space or time 9. 多维训练 写出下列句子中take up的汉语意思 (1)He did not particularly want to take up a competitive sport.

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