________ on the top of the mountain is an ancient tower dating back to hundreds of years ago .

I __________ to Canada twice. It’s so beautiful.

It’s too late. I have to go now.—Oh, it’s raining outside. Don’t leave ______ it stops.

Xiao Zhang has ______homework every day and she really doesn’t know ______ first.

Little Tom ran all the way to school,getting there________[ ]