Remember to _____the lights before you leave the classroom to save electricity.
A.turn down B.take off C.turn off D.put off
（题文）I was writing a diary ______ my brother was watching TV yesterday evening.
A. before B. after C. until D. while
It’s much _____ to have a small lovely room than a big cold one.
A.good B.well C.better D.best
I hear _____ of the books in the library _____ new. Let’s borrow some.
A.two third, is B.two thirds, are C.two third, was D.two thirds, were
Let’s try our best to _____ paper to save the trees.
A.change B.make C.recycle D.waste
—Which country has _____ population in the world?
—Of course, China.
A.the most B.the largest C.the biggest D.the smallest
