The US President Obama told the students that he ______ by a single mother who were strict with him and wished him great success in his studies.
18.He injured his leg and ______ couldn’t play in the game.
17._____ at the gate of the theatre, he found the ticket for the play was left at home.
16.By the end of last year, another new gymnasium _____ in Beijing.
15.At the meeting, a proposal that he should take charge of the project _____.
14.Teachers _____ their knowledge to their students .