Good morning, class. Today ____ are going to learn a new unit, Unit 12.
Could you please _______ your clothes?
—Could I use your computer?—Sorry, I will ________ it.
—Could I borrow your book?—Of course, you _______.
---- Last night,you forget _____off the computer when you went to bed.----- Really?I remember _____off.
Look! There are many people ______ in the lake.