What is your mother doing ____ vacation?A. for B. at C.in
— I wonder if I can learn English well. — _______. All things are difficult before they are easy.
---What’s your favorite fruit? ---I like ______ best.
There's _________800-metre-long road behind _________ hospital.
–What did your teacher say just now? --He asked me __________.
—The scarves are all beautiful. I can’t decide which one to choose. —Oh,look at this red one. I think it’s______.