— Sam, you don’t work hard at geography.— My dad says that the world is changing every day,        I decide to wait until it stops.

I was just falling asleep ____ there was a loud knock at the door.

The shirt is nice,           it’ s not big enough.

Although he is really heavy,   he still runs fast.

—What do you think of the book A Haw Tree written by a woman writer?—It reminds me of the days ________ I spent in the countryside.