Mr Li looks often looks tired and worried — So he does. You see it’s not easy to such a big factory.

We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold.

I walked 20 miles that day.I never thought I was able to walk ___ far.

It is a pity that the music festival has been _______ because of the heavy rain.

What do you think of Miss Wang, your English teacher– She’s very ______ to our need for encouragement.