Why did you laugh just now— John wanted to tell usveryfunny joke, but he forgotendhimself.

The book you want is not ___now. I will letyou know as soon as it is returned to the library.

下列句中，不全含有通假字的一项是（ ）

(2009·陕西)Gun control is a subject ________ Americans have argued for a long time

We’ll have _______ holiday in June. Will you gohome— No. If I go home, I’ll have to take_______ ride.