Is this the river __ I can swim ?
1 which 2 in which 3 that 4 the one
答案：2
解释：这里是定语从句,which代替 the river,把从句语序调整过来就是 I can swim in which(the river),这里关系词要做in的宾语,而且in在前面只能用which不能用that,如果river前面的the省略的话可以选择4
They went back to help the man ,__car broke down.
1 his 2 whose
答案：2
解释：这是逗号隔开的句子,因此是个简单句,简单句中只允许有一个谓语动词,前面已经有went作谓语,所以后面broke只能是从句的谓语动词,his不能引导从句,选择2
There are __eating grass on the hill.
1 much sheep 2 lots of sheep
答案：2
解释：sheep是属于可数名词,只不过单复数相同,much是修饰不可数名词的,所以这里不能用much,可以用many.lots of 既可以修饰可数名词又可以修饰不可数名词
He has __books than I .
1 many more 2 much more 3 a lot of 4 so many
答案：2
解释：这里面有than,肯定用比较级形式,34都不是比较级,淘汰,many不可以修饰比较级,much可以修饰比较级
We should do sports to __ our health every day.
1 stay 2 take 3 make 4 improve
答案：4
解释：1有保持的意思,但是保持健康一般用keep,淘汰1.2 3带入句子中翻译不合适
翻译：我们应该每天锻炼身体改善身体状况
How much should I __this digital camera?
1 pay 2 be paid 3 for 4 paid
答案：没有正确选项,应该是pay for
解释：pay 后面要用介词for 1淘汰 2用的是被动,这的主语是I 与pay之间是主动关系,淘汰2,3里面没有动词,4should后面加动词原形
Tom's father was pleased ,because he managed to pass the final exam.
managed to 在句子中是什么意思?
解释：managed to 想方设法做成了某事
翻译：Tom的父亲很高兴,因为他成功通过期末考试
We went on a horse ride when we were visiting Inner Mongoloa.
went on 不是 继续 吗?
解释：on是在马上,这里不是词组
翻译：当我们去 Inner Mongoloa.旅游时我们骑着马