---What _____ useful book! And ______ book is popular with students.A. a, a B. a, the C. the , the
—Have you finished your homework________? —Yes, I’ve done it ________.
Steve is looking ________ a Chinese friend by chatting ________ some Chinese children on the Internet.
—Hello, Mr Green! Could you tell me something about your study? —OK, but I’m busy now. I’ll get back to you ________ a minute.
.Li Ming listens to the teacher asas Tom.
-----When did you arrivethe farm? ----- Sunday evening.