People have always been curious ______ how living things on the earth exactly began

The moonlight is shining in _________ thewindow. Everything in the room looks so nice.

My mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it

Vegetables _____many kinds of vitamins and many other useful materials, so we must eat them______．

I thought we’d be late for the concert，________ we ended up getting there ahead of time