If there are ______ trees, the air in our city will be _______ cleaner.
____ it snowed heavily yesterday, nobody in our class missed the lesson.
Tomorrow there’s a programmed about our school on TV,then it ____ by millions of people.
My brother is two meters in height.It’s very difficult to find clothes big enough ____ him.
—Have you ____ joined in a dragon boat race?—Yes,I have.
I forget to bring a pen.Would you lend me ____?