John went to the hospital alone. If he_______ me about it, I would have gone with him.

He insisted that his plan _______ carried out at once. 

It is required by law that the children above six years old in our country ________ to school to receive education.

It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off．

I was so young.  You__________ better than to rely on me