I like getting up very early in summer. The morning air is so good _________.
The first World Cities Day of the UN, _______on Oct.31, 2014 in Shanghai, focused on leading urban transformation.
—You should take exercise in your spare time. —I want to,but the little time I have outside of school isby part-time job.
The good thing about today’s children is that they can_____ very easily to new environments.
As a teacher, it is my _________ to make the students devoted to their study.
The research lacksevidence,and therefore,its conclusions are doubtful.