The UN is trying to ______ the world ________ hunger.

Today acupuncture(针刺疗法) has become popular round the world, _____ other traditional Chinese medicines.

His face looks familiar(熟悉的) to me. I remember _____him ______ in my hometown.

Do you know when your friend ___ –I’m not sure. I will tell you when he _____

Have you ever been to ______ aquarium inQingdao before