While watching television，____ ．
| A．the doorbell rang | B．the doorbell rings |
| C．we heard the doorbell ring | D．we heard the doorbell rings |
A tunnel was built under _____ was a lake a year ago.
| A．where | B．which | C．that | D．what |
—Mary, don’t you believe your sister?
—Yes. I believe _____ she says.
| A．however | B．no matter how | C．whatever | D．no matter what |
Today impressionist paintings are accepted as the beginning of ______ we call “modern art”.
| A．which | B．what | C．that | D．how |
—Sir， can I pass the examinations this time？
—That depends on you work hard enough or not.
what B. that C. whether D. how
— That boy enjoys drawing very much.
—____, I have never seen anyone else who is as enthusiastic about drawing as he is.
| A．As long as I have traveled | B．Traveled so much as I have |
| C．As I have traveled so much | D．Much as I have traveled |