下列加点字的读音全都相同的一项是（ ）

Don’t be angry with us. We _____ with you together, but we were busy with our final reports when you called in.

I don’t know if it ____ tomorrow. If it _____, we will go out for a picnic.

Not until he failed in the last examination _________ he should have spent more time on study.

The point is that no medicine is ________for children when they are infected with the hand-foot-mouth disease ．