题文
—When _________ the car _______ ?
—Sorry. I don’t know.
| A．does; invent | B．did; invent | C．was; invent | D．was; inventing |
—When _________ the car _______ ?
—Sorry. I don’t know.
| A．does; invent | B．did; invent | C．was; invent | D．was; inventing |
试题篮
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