The message is very important, so it is supposed _______ as soon as possible.

Having checked the doors were closed, and ________all the lights were off, the boy opened the door to his bedroom.[ ]

His uncle would rather ___________ the old bike than ___________a new one.

he was investigating ways to improve the telescope,Newton made ________ discovery which completely changed ________ man’sunderstanding of color.

I don’t know if Aunt Li these“stay-home children”tomorrow morning.— If I her,I would come earlier.