1.Please write your name a piece of paper.A.down B.at C.in D.on2.You can walk __________ the bridge __________ the river .A．cross ...on B．across...over C．across...above3.It isn't right whales elephants for their meat.A.to kill,and B.to kill or

1.Please write your name a piece of paper.A.down B.at C.in D.on2.You can walk __________ the bridge __________ the river .A．cross ...on B．across...over C．across...above3.It isn't right whales elephants for their meat.A.to kill,and B.to kill or
1.Please write your name a piece of paper.A.down B.at C.in D.on
2.You can walk __________ the bridge __________ the river .
A．cross ...on B．across...over C．across...above
3.It isn't right whales elephants for their meat.
A.to kill,and B.to kill or C.for killing ,or D.for killing,and

1.Please write your name a piece of paper.A.down B.at C.in D.on2.You can walk __________ the bridge __________ the river .A．cross ...on B．across...over C．across...above3.It isn't right whales elephants for their meat.A.to kill,and B.to kill or
D.on
写在纸上,要用on paper
B．across...over
穿过桥 walk across
河上的桥要用over the river
B.to kill or
it isn't right to do sth做某事是不对的,所以要用to
此处应该为鲸鱼或大象,两者并不是一起杀死,要or

1 D write (sth) on paper，固定搭配
2. B across 表面横过
over，上方横过
3。B
kill whales 或elephants，因为这两个动作不是同时进行的。

第一题用on，在纸上的在用on。
第二题用across和on，walk是动词，across是副词修饰动词walk表示走过，桥在河上用on，above或者是over一般用在飞行的物体比如飞机，或者是离河面很高的比如跨河大桥，我想在此不适用。
第三题用to kill和 or。it isn't right to do something是惯用句式，比如it‘s good to keep ...

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第一题用on，在纸上的在用on。
第二题用across和on，walk是动词，across是副词修饰动词walk表示走过，桥在河上用on，above或者是over一般用在飞行的物体比如飞机，或者是离河面很高的比如跨河大桥，我想在此不适用。
第三题用to kill和 or。it isn't right to do something是惯用句式，比如it‘s good to keep a healthy diet。然后在否定句式里面不用and用or。

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1 D write ... on ... “把...写到...上”
2 B cross 是动词，across 是介词，本句中，动词walk只能与介词构成短语
on 指表面接触，over 指垂直上方，above 指斜上方
3 B It's + adj. to do sth “做...是...的”. 另...

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1 D write ... on ... “把...写到...上”
2 B cross 是动词，across 是介词，本句中，动词walk只能与介词构成短语
on 指表面接触，over 指垂直上方，above 指斜上方
3 B It's + adj. to do sth “做...是...的”. 另外，否定句中的“和”用or

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