企源知识库

We have been told that the contract in question is _____ for one year starting from the June.
A、useful
B、efficient
C、practical
D、effective
【正确答案】：D
【题目解析】：useful有用的；efficient有效率的；practical实际的；effective有效的句意：我们已被告知合同有效期为一年，从6月开始。