This new kind of chemicals will help keep the air, soil and water________ from pollution.
____ sat down for a rest the door bell rang.
Human facial expressions differ from those of animals in the degree ___ ___ they can be controlled on purpose.
Chan’s restaurant on Baker Street, ___ ___ used to be poorly run, is now a successful business.
Those successful deaf dancers think that dancing is an activity ___ ___ sight matters more than hearing.
It is reported that two schools, ___ ___ are being built in my hometown, will open next year.