—Xiaoming, you are late again, can you tell me why?—I was on the half way when it _______to me that I had left my notebook at home, so I have to fetch it.
American Indians ________ about five percent of the U.S. population .
I can think of many cases ______students obviously know a lot of English words and expressions but couldn’t write a good essay .
When I get puzzled about some difficult problems, my teacher always encourages me and says , “Take it _________ .”
____ the students in our school go to college in their teens.
The plant is dead. I ____ it more water.