专四专八考试

【单选题】 The student did his homework ______ his professor had assigned.
A．when
B．as
C．until
D．if

网考网参考答案：B
网考网解析：
[题解] 本句意思是这学生按照教授的布置，做好了家庭作业。 查看试题解析出处>>