It happened to be very cold ____ the morning of our sports meet. [ ]

My son wants a pet dog for long, but I have no time to buy _____for him.

Now the air in our city is _______ than it used to be. Something must be done to stop it.

Don’t ______ /l?k/out of the window in class.

It’s down Tian’an Men Square_____ the right.[ ]