We drew this conclusion on the _______of research and experiments.

（天津市河东区201 4年高三二模考试）3.1 wonder if this dress is____in a larger size. This one is too tight.

As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks. 

There is plenty of food，water and sunshine，and our friends are living there，________.

 It seems that the young man and the lady have little __________.