.The question then ______ that the supply of drinking water in the mountainous area is serious.
The equipment for all of the disabled people ought to be _________ easy reach in public.
The first snow of every year is always so exciting, but too much snow _________ cause trouble
People say that young Chinese students’ eyesight keeps dropping _________ because of both too much homework and poor learning conditions.
At present an increasing number of parents wish to _________ changes in educating their children due to dissatisfaction with the educational system.
To get a good view of the scenery in China, Lucy would spend a lot of time on the train _________ travel by air.