专升本考试

【单选题】This is the second time she ______ improvement on that equipment.
A．had made
B．made
C．is making
D．has made
网考网参考答案：D
网考网解析：
[解析] 句中的the second time决定了后面应该用完成时态，又因为前面是is，所以用现在完成时，若是Was，则用过去完成时。 查看试题解析出处>>