下列句子中没有语病的一项是（ ）

Sorry, Frank. I’m busy today. I can’t goswimming with you. — ______ .

If you don’t know the meaning of the word, ________ the dictionary.

I often chat with my friends on the Internet.— You are so smart! Will you please tell me____

We should do all we can the children who lost the chance to go to school