Our school appeals to the students to _________ at least an hour every day to take exercise in order to raise learning efficiency.
On AIDS Day, the minister of Health Department demanded that the problems _____ paid special attention to.
Getting your students ________ in classroom activities is vitally important.
Mr. Tiger insisted that he _______ the money back to his boss but his boss said that he didn’t receive it.
_______ in the leg made it impossible for him to walk to school every day.
We were stuck at the airport because of the heavy fog, otherwise we ________ here in time for the conference.