第六届海峡论坛2014年6月15日在厦门海峡会议中心举行。中共中央政治局常委、全国政协主席俞正声出席论坛开幕式并致辞。本届论坛以“和谐发展、幸福两岸”为主题,为推进两岸关系和平发展,实现幸福两岸,必须坚持的政治基础是( )
I_______ my homework when my mother________back.
My mouth was watering________I watched the TV program A Bite of China.
She_______ to an English program while her parents________TV.
—What were you doing when we were dancing yesterday afternoon?—I_______ the classroom.
Little Tom_________ computer games when his father got home.