--- Mum, why don’t you have the robot ________ housework for you?--- Oh, it caught a virus. I should have it _________ at once.
—Did you see Tom yesterday? —No, I ___________ him for a long time.
Come here, I’ll tell you ___________ about your study. —OK, we’re coming.
—What animal do you like best? —I like __________ best.
Huang Wei rides a bike very well. Who taught him? —No one. He taught _________.
—You won’t pass the exam ________ you don’t work hard. —OK, I’ll do my best.