日本語をクリックすると英文が表示されます。まずは自分で英語にしてから答え合わせを。
Does your mother teach you how to cook?
You must(have to) decide which book to buy.
As both books look interesting, I don't know which to buy.
Why is it necessary to study many subjects?
Will you please tell me what to buy at the store?
It is interesting to learn new things.
I didn't know what to say.
It is impossible to master a foreign language in a year.
He wants to know how to study English.
Is it easy to drive a car?
Do they know where to go?
It is important to learn(study) English.