I don’t know ______ with this problem. It’s too hard.
Last weekend, an English short play was _____ in the second hall.
Few people knew how to use the Internet in the past,_____?
—What should we do before we use the blender? —I think we must read __________.
—How long ago ______ you ______ the English Club? —I ______it since two years ago.
Would you like to go ________?