We must take part in more environmental activities, ______________more trees and flowers to make us live in a beautiful home with the blue sky, blue water and green land forever.
A.to plant B.planting C.planted
If you want to hear those beautiful sounds of nature, you must be the one ______________is not only quiet but also patient.
A.who B.whom C.which
—Can you tell me some ways to improve my English?
—Sure, you could ______________five minutes earlier and listen to the news in English.
A.wake up B.give up C.come up
—______________have your grandparents been in Sanya?
—Five months. They will be back soon.
A.How soon B.How long C.How often
—Could you tell me______________?
—In the library. He was preparing for his papers when I saw him.
A.where you found Mr. Black B.where did you find Mr. Black C.where you find Mr. Black
Kim has been the first DPRK leader（朝鲜最高领导人）to cross the border（分界线）onto the Korean soil______________ the end of the 1950-53 Korean War.
A.since B.until C.after
