21._______economic development with environmental preservation ,and Chinese people will be able to enjoy the fruits of a rapid development and a good environment.
A. Balancing B. To balance C. Having balanced D. Balance
22. Not until recently ______ the development of tourist-related activities in the rural areas.
A. they had encouraged B. had they encouraged C. did they encourage D. they encouraged
23.The MP3 ______ young people ______ a bit of decline so far with the appearance of the MP4.
A. intending to; has entered into B. intended for; has gone into
C. meant to; takes on D. meant for; opens up
24. The young girl ______ a sound while her grandmother is sleeping.
A. dare not to make B. doesn’t dare make C. dares not to make D. dares not make
