题文
You can watch TV ______, but you can’t watch it ______ a long time.
| A．one, at | B．one, for | C．first, for | D．first, at |
You can watch TV ______, but you can’t watch it ______ a long time.
| A．one, at | B．one, for | C．first, for | D．first, at |
试题篮
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