See the clouds! It ___ rain.
.—Let’s back up. Where was I?—______.
Good job! Not a single mistake ______ in your homework.
If you ______ half an hour every day for English reading, you are sure to improve your reading ability.
Hi, somebody ______ the window, please. It’s too cold in here.
______ you think you can or not, you must finish the project before Friday.