—I can't remember those grammar rules!—_________. Practice more.
A tunnel was built under _____ was a lake a year ago.
—Mary, don’t you believe your sister? —Yes. I believe _____ she says.
Today impressionist paintings are accepted as the beginning of ______ we call “modern art”.
—Sir, can I pass the examinations this time? —That depends on you work hard enough or not. what B. that C. whether D. how
, a form must be filled in.