题文
Ihis is ______book I've told you about. It's written by_____ university teacher．
| A．the;an | B．a;an | C．the;a | D．a;the |
Ihis is ______book I've told you about. It's written by_____ university teacher．
| A．the;an | B．a;an | C．the;a | D．a;the |
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