请帮忙,应该选哪一个选项?为什么?The boy found himself in a bad situation when ___ in the river.A. swimming B. swims C. to swim D. swam

请帮忙,应该选哪一个选项?为什么?The boy found himself in a bad situation when ___ in the river.A. swimming B. swims C. to swim D. swam 应该选哪一个选项. final和end有什么区别?原题是这样的、On the last day he made a big decision.It was the ____day of his hoilday.选项是final和end、应该选哪一个?为什么?请讲的详细点、、 应该选哪一个为什么 关于区分常见物质方法的B,D选项应该选哪一个?为什么? 帮忙看一下应该选哪一个 定语从句疑问一The man ___ visited our school yesterday is from London.A.who B.which C.whom D.when该选哪一个?为什么?请着重讲一讲A选项和B选项, 图形推理题,请帮忙看下这五个图片后面的第六个图应该选哪个?附上图片,最好能解释下为什么选那个选项, He was often listened______in the next room.此题有4个选项,应该选哪一个,请说明原因A.sing B.sung C.to sing D.to to sing 选哪一个选项? where 空格 will you go,children.A place B other C else D the other请帮忙分析四个选项为什么选,为什么不选,我上课用, the back garden of our house contains a leaving --very pleasant to sit on in summer.which iswhich it isit iswhere it is这四个选项应该选哪一个?为什么?能具体分析一下吗?谢谢! Thomas Edison is generally considered ( )the first lampA.to have invented B.inventing C.to invent D.having invented应该选哪一个，为什么 这题的选项和consider有关吗，后面是跟ING形式吗 ( )you do't pass the exam?A :What whether B:What will do C:What to do D:what if请告诉我哪一个是正确选项,并且为什么选这一个. He calls at every house in the street.He____everyone.A.calls B.visits答案应该选B.为什么?AB选项意思相同,有什么区别?请详细将来, 英语翻译blanketa.something that covers you in bedb.something that you lie on这两个选项应该选哪一个?给出答案并且请说明原因, The seasons here are different from____(that ,those ,these)in Australia.应该选哪一个?为什么?就是括号里的三个单词应该选哪一个填进去。 哪个部位心壁最厚?有四个选项：左心房,左心室,右心房,右心室,应该选哪一个呢?