单词拼写
May I introduce one of my________(同事)in the party?
Some fish are very________(多产)；they lay thousands of eggs.
I hate shopping during the Christmas ________(热潮)when the shops are crowded.
Our school is________(环绕)with a small river.
The ship's sailing________(向下游)．
We must make careful plans when we________(开发)the country's mineral resources.
He has made an________(巨大的)improvement.
________(当然), as a beginner I'm not a very good driver yet.
They________(用筏子运送)the coal down the river.