Several days has passed_______the air crash(空难) happened. A.since B.after C.as
---______ are you buying so much food? ---Because your uncle is coming for supper.
My grandfather does well in ______ lanterns ______ oranges.
Fast food _____ delicious,but it's bad for _____.
There snow and ice in Beijing this year.
He is have a trip to China Space Museum.