“Look at these tracks. It _______ be a w
题型:选择题
问题:
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
A.must; could
B.may; might
C.need; must
D.could; need
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
A.must; could
B.may; might
C.need; must
D.could; need