When_________why he was late, he made no answer.
It is _____ great pleasure for me to come to ______ College of Europe and meet with faculty members and students.
— Do you know _______ they got to know each other?— It was last year_______ they both taught Chinese in Canada.
the players didn’t have a good rest shouldn’t be all excuse for losing the game.
According to the latest investigation,most mistakes be prevented if students are careful enough.
According to Xi, common values held by Chinese people of all ethnic groups are ________ for the country's future and its people's well-being.