As is known to all, the financial crisis firstly broke out in the United States, ______ the group of developed countries.
| A．belonging to | B．relating to |
| C．aiming at | D．coming to |
____ they are closest friends is not clear though they live together.
| A．That | B．If | C．What | D．Whether |
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