高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
“We’ll be ready to leave at six.” “Well, Ralph certainly ＿＿＿＿ to be back by then.”
A.ought
B.can
C.must
D.should
“We’ll be ready to leave at six.” “Well, Ralph certainly ＿＿＿＿ to be back by then.”
A.ought
B.can
C.must
D.should
参考答案：
佳题速递：