—I __________. It's not safe.
—Don't worry. When she ________, I will tell you.
—Look! He_________ flowers outside.
—Sorry, she isn't in. She ________ ping-pong outside.
—No. He___________ his car outside.
—Oh, she ________ the meeting.
—I ______ my keys. I have to wait here until my mother comes back.
— Sorry, I don't know. I _______here for only a few days.
—Oh, really? I _______know. I ________her for a long time.
—Yeah, he ___________be shy, but now he is confident and active.
—He home since last week.
—It is _________ book I ________ since Grade Two.
—He is in Shenzhen. He ___for a month.
—No, it ___________be her. She has ___________to Beijing on business.
—Sorry, she isn't in now. She ______ the library.
— No, it ______ be him. He has ______ Guangzhou and will be back in two days.
—Oh, I can't believe it!