Do you know the boy ______ brown hair?
My younger sister is always _________ but she also likes listening to others quietly.
-- Is it your brother playing football outside? -- It ________ be him. He is helping mother with dishes now.
--Have you finished your work yet? --Yes, I have . It ____________ half an hour ago.
Money is important _____ it’s not the only important thing in our life.
I have to work hard _____ the test.