题文
–Excuse me, is this seat taken?
_______. That man got his books and left a few minutes ago.
| A．I am afraid so. | B．I don ’t think so. |
| C．I don ’t know. | D．I hope not. |
–Excuse me, is this seat taken?
_______. That man got his books and left a few minutes ago.
| A．I am afraid so. | B．I don ’t think so. |
| C．I don ’t know. | D．I hope not. |
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