研究表明当人们花时间帮助别人时,他们会感到快乐Studies show that people will feel happy when their time is（ ）（ ）others.在学校呆了一天后,户外娱乐活动可使孩子们得到放松.Outdoor（ ）will（ ）children after a day’s study in schoo
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Studies show that people will feel happy when their time is（spent ）（on ）others.
Outdoor（activities ）will（ relax ）children after a day’s study in school