don’t think all this bad language on TV should be allowed; there are certain standards that should be ________.[ ]

He’s one of those early birds.It’s ________ of him to get up early.[ ]

_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.

下列句子没有语病的一项是（ ）

I prefer tea ______ coffee.