She is so______ to his English teaching that I admire for his______.
| A．devote; devote | B．devoting; devotion | C．devoted; devotion | D．devoted; devote |
How ___I help them to understand when they won’t listen to me?
| A．can | B．would | C．may | D．must |
In summer, food will go bad if________in room temperature.
| A．leaving | B．left | C．being left | D．having left |
QQ,________you can chat with your friends, makes communication easy.
| A．why | B．which | C．that | D．where |
_____ you don’t lose heart, I’m sure you can pass the coming examination.
| A．Unless | B．As long as | C．If not | D．Although |
__________all kinds of difficulties，the workers have made rapid progress in the construction of
the World Expo 2010 Shanghai．
| A．With | B．For | C．Under | D．Beyond |