It is difficult to ()work as it is sometimes mixed together with labor by most people.

[单选题]The atmosphere_____certain gases mixed together in definite proportions.A.c

[单选题]The atmosphere_____certain gases mixed together in definite proportions.A.c

[单选题]The atmosphere_____certain gases mixed together in definite proportions.A.c

[试题]B．etween labor and play______(stand)work.

[单选题]The food is [inadequate]for ten people.A.demandedB. qualifiedC. insufficien

My ________ all ________ hard for the people.A. family; workB. family; worksC. f

Education does _ to young people.A. countB. importantC. vitalD. importance

[单选题]Nowadays people sometimes separate their waste to make it easier for it .A． reusing B. reused C. reuses D. to be reused

[单选题]Nowadays people sometimes separate their waste to make it easier for it ( ) .A． reusing B. reused C. reuses D. to be reused

[单选题]Labor productivity is most likely to increase as a result of a (n):A.Increa