There is so much noise in the yard that I can’t ________ my attention on my work.

Don’t touch the machine_________ the teacher allows you to.

We couldn’t see the road clearly _____ the heavy snow.

The couple’s quarrelling and fighting last Friday each other. —I think so. Nancy was in the arm and she blamed that her arm the whole week. [ ]

What happened to your shoes?— They want . [ ]