______ Tom is ill, _______ he goes to school.
Listen! Someone _________ for help! A. called B. is calling C. has called
I am going to make ________special house for my pet pig this weekend. A. an B. a C. the
Healthy food and exercise help ________to study better. A. us B. we C. our
________is dangerous for us to swim in the river alone. A. It B. That C. This
She likes reading. She usually________ some books from the library. A. buys B. lends C. borrows