How long do you usually _____on your homework everyday?
. —______ to the Shanghai?—No, never, but I went to Beijing a few years ago.
—How many students are there in the classroom? ____. They are all in playground.
I ______ my English teacher for two years.
I haven’t finished my work ________.
—David, can you tell me how to use this new camera? —. Let me have a look.