Whether dying patients be helped to end their lives is a tough moral question.

Professor White has written some short stories,but he is_______ known for his plays.

Chinese painters—Cao Wu and Yuan Wu—will alsoexhibit their works that feature Chinese elements(元素), ________ those of Northeast China.

68 It was at four o’clock in the afternoon ____ he and his grandpa reached the museum in Guanghan

I thought I asked you to fix the radio.—Oh，I’m sorry.Mother，I__________it right now.