The sweater is 20 dollars.(对画线部分提问)
is the sweater?
He (误以为) Mary for her twin sister and that made them laugh a lot.
(在……期间) his stay in Beijing, he made some foreign friends.
We hope to live (peace) with people from other countries.
Do you believe it is one of the (wind) places on the earth?
For your own (safe), please do not walk about on the plane.