at play 在玩耍 即境活用17 How long have the two countries been ________ war? A.at
B.on C.in
D.under [解析]at war 在交战。句意:两国交战多久了? [答案]A 重点句型
1.There is no doubt that the boxes were then put on a train for Königsberg, which was at that time a German city on the Baltic Sea. 毫无疑问,这些箱子后来被装上火车运往哥尼斯堡,当时它是波罗的海海边的一个德国城市。 (1)There's no doubt that... 毫无疑问……,该句是固定句式,当 doubt 前有否定词时,其后用 that 引起同位语从句;当 doubt 前无否定词时,即主句为肯定句时,后面用 whether 引起从句。注意不可以用 if 替换 whether。 (2)doubt vt. 后接名词、代词或宾语从句。在否定句和疑问句中, doubt 后面接 that 引导的宾语从句;在肯定句中, doubt 后面一般接 whether 或 if 引导的宾语从句。 There is no doubt that our experiment will succeed. =There is no doubt about the success of our experiment. 毫无疑问,我们的实验会成功的。 There is some doubt whether he can win the first prize. 他是否能赢得一等奖还有些疑问。 I doubt whether/if the new one will be any better. 我不敢断定这个新的是否会好些。 I don't doubt that Chinese diet is the healthiest in the world. 我相信中国的饮食是世界上最健康的饮食。 即境活用18 There is still some doubt ________ the autumn sports meeting will be held in our school, but there is no doubt ________ it will be held soon after our National Day holiday. A.that; that
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