问题补充:
单选题She____onherhomeworkinherstudynow.A.must workB.can workC.must have workedD.must be working
答案:
D解析对正在发生的事进行推测。
时间:2019-01-30 20:12:24
单选题She____onherhomeworkinherstudynow.A.must workB.can workC.must have workedD.must be working
D解析对正在发生的事进行推测。