We were told not to touch the equipment in thelaboratory unless ________.

Anyang is a famous city ____has a long history and richculture .—I hope I can visit it some day in the future .

Jack, they are your new shoes.You can ____.

下列句中加点词不属于古今异义的是

Look at the ______, madam. The red skirtis smaller than the blue one.— Yeah. The red one suits me better, Ithink.