1.I visited a place which/that is surrounded by mountains.
为什么用which/that不用where?

2.Wandering carelessly along the road,he was knocked down by a bike.
为什么wander要加ing?

3.You can never imagine how exciting his speech made us last time.
为什么"speech"用excited修饰,而不用"exciting"?

4.It is freezing cold today, so remember to put on your overcoat before going out.
freezing是形容词吗?如果是形容词，后面为什么还有个形容词cold?

5.The city was set up in what was once a small village.
为什么用what不用where?

6.The boy came straight up to me and said hello tome.
came是动词,为什么用形容词straight来形容?

7.Visiting a city you have never been to before can be great fun.
在great前面为什么不加a?

1.I visited a place which/that is surrounded by mountains.
为什么用which/that不用where?
a place 可数的，特殊的一个地方，　当然用which.

2.Wandering carelessly along the road,he was knocked down by a bike.
为什么wander要加ing?
分词短语做状语．

3.You can never imagine how exciting his speech made us last time.
为什么"speech"用excited修饰,而不用"exciting"?
excite是动词，要变成分词做形容词，这里是主动，所以用现在分词．

4.It is freezing cold today, so remember to put on your overcoat before going out.
freezing是形容词吗?如果是形容词，后面为什么还有个形容词cold?
freezing是形容词，形容词可以修饰形容词．

5.The city was set up in what was once a small village.
为什么用what不用where?
in 后面只能跟what.　如果没介词，可以用where.

6.The boy came straight up to me and said hello tome.
came是动词,为什么用形容词straight来形容?
straight 是副词．来修饰动词　come的．

7.Visiting a city you have never been to before can be great fun.
在great前面为什么不加a?
fun是形容词，不是名词，当然不用a. 例子：you are good. 能加a吗？如果说you are a good man.就必须放了．