Although the teacher had told Bob the history of telephone, Bob didn’t know when ____.
| A．it was invent | B．was it invented | C．it was invented | D．it invented |
相关试题
—__________, are you Ben? —No, I’m not. I’m Peter.
| A．How are you | B．Hi | C．Excuse me | D．Thanks |
找出下列发音不同的选项。
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—_______ can I keep the books? —Two weeks.
| A．How long | B．How often | C．How far | D．How soon |
I think _______ necessary for you _______ breakfast.
| A．this; have | B．that; to have |
| C．it’s; to have | D．it’s; have |
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