— ____ sweep the classroom yesterday？
—I was playing tennis with my friend．
| A．Why not | B．Why didn't | C．Why don't | D．Why didn't you |
The people of Wenchuan are very brave, and they will surely _____ the problems caused by the earthquake.
| A．break down | B．keep off | C．break off | D．get through |
．Researchers from MIT, Harvard reported a study of human brains yesterday that may______ some new information for mental illnesses.
| A．create | B．provide | C．expect | D．imagine |
—Where was it ____ the earthquake broke out yesterday ?
—In an Italian city.
| A．where | B．which | C．how | D．that |
Marking "Earth Day 2009" with his plan for _____ energy．President Barack Obama on Wednesday called for energy exploration.
| A．alternative | B．traditional | C．available | D．inexpensive |
As a matter of fact, nearly everybody in the world would like to be ____ Bill Gates is, doing ____ he is doing.
| A．where; what | B．what; that | C．that; what | D．who; that |