题目

Mr Zhang some ducks on the farm. （ ）A. is B. has C. there are 答案：【答案】B【解析】句意：在农场里，张老师......一些鸭子。A是，张老师不可能是一些鸭子，排除；B有，表示某人有某物；C there be句型表示某地有某物，不需要主语，排除；故答案为：B.If we go on using energy so wastefully, __________ are that our oil wells will be dried up before new energy sources can be found to replace oil. A. chances             B. opportunities            C. questions                  D. problems