试一试: Man: How was the new restaurant? Woman: The food was great, ___ the chairs were very small. 选出那位女士会说的话。 (so / but / because) 答案: but — 菜很好吃，椅子却很小，两者不一样，所以她说 but。
so（所以）
用 so 说出因为前半句而发生的事。
The store was closed, so we went home.
I was tired, so I went to bed early.
试一试: Man: Did you watch the game last night? Woman: No. My TV was broken, ___ I listened to it on my phone. 选出那位女士会说的话。 (because / although / so) 答案: so — 电视坏了，她才用手机听，所以她说 so。
although 连接两个句子
后半句出人意料时，用 although 连接两个句子：Although it was late, I went out。
Although it was late, I went out.
Although I was tired, I finished my work.
试一试: Woman: Did you enjoy the party? Man: Yes. ___ I didn't know anyone, I had a great time. 选出那个男人会说的话。 (Because / Although / So) 答案: Although — 在一个谁都不认识的派对上玩得很开心，这出人意料，所以句子以 Although 开头。
不要说 although … but
用 although 或 but，一个句子里不能两个都用。
Although the bus was full, we got on.
The bus was full, but we got on.
Not "Although the bus was full, but we got on." — say "Although the bus was full, we got on.". although 后面不要再加 but。
试一试: Man: How was the trip? Woman: Although the hotel was small, ___ 选出那位女士会说的话。 (but we loved it. / we loved it. / so we loved it.) 答案: we loved it. — 用了 although，后半句就不需要再加连接词了。
用哪个连接词？
按意思来选：原因用 because，因此发生的事用 so，不一样用 but。
We stayed home because it rained.
It rained, so we stayed home.
It rained, but we went out.
试一试: Woman: Why is the house so clean? Man: My parents are coming tomorrow, ___ I cleaned everything. 选出那个男人会说的话。 (but / because / so) 答案: so — 他打扫是因为父母要来，所以他说 so。