though yet 的用法Though he is clever,_____ he doesn't work hard.A.but B./ C.yet D.B and C是否可以选D

例子：
Though he is clever, he doesn't work hard.
虽然他很聪明，他不用功。
He is clever, yet he doesn't work hard.
他很聪明，但他不用功。
你的句子意思上有些怪。 用我的例子吧。
Though he works very hard, he doesn't do well at school.
虽然他很用功，他成绩不好。
He works very hard, yet he doesn't do well at school.
他很用功，但他成绩不好。

选B
前有THOUGH,后边不用表转折的连词

B

B ,不能选D，就像我们常用的because...不能加so....一样啊，像because it is right，you should choose B不能加so一样
though
conj.
1. 虽然;尽管
Though he is rich, his life is not happy.
他虽然很有钱,但生活并不幸福。
ad.
1. (一般放在句尾)然而,还是
It was a hard job, he took it though.
这是份苦差事,可他还是接受了。
yet
ad.
1. (用于否定句)还(没)
The moon has not risen yet.
月亮还没有升起。
2. (用于疑问句)现在,已经
Has he finished the work yet?
那工作他做完了没有?
3. 总有一天,终必
He will suffer for fun yet.
他总有一天会因贪玩吃苦头。
4. (与比较级连用)更,益发
That job is yet more demanding.
那个工作甚至更加费力。
5. (与once,another等连用)再
I have yet another question to ask.
我还有一个问题要问。
6. (与*连用)到目前(或当时)为止(最...)
7. 而,然而
My room is small yet cosy.
我的房间很小,但很舒适。
8. 依然,还
There is hope for her yet.
她的事仍有希望。
conj.
1. 可是,却,然而
I don't know him, yet I can get his help.
我不认识他,但我会得到他的帮助

可以选D
Although和though都可以与yet连用,但是不可以与but连用.