By the time he was twelve, Edison _______ to make a living by himself.
| A．has begun | B．began | C．had begun | D．had been beginning |
相关试题
They wanted the house at the foot of the mountain ______in a way to look pretty
| A．build | B．to build | C．built | D．building |
The editor's job is to keep the newspaper______ and _____ to the readers.
| A．balanced; interested | B．balancing; interesting |
| C．balanced; interesting | D．balancing; interested |
Will you drop in at my house this afternoon if _________?
| A．it is convenient to you | B．you are convenient |
| C．it is convenient of you | D．you will be convenient |
A new dining room ________ in our school. It will take one and a half years to finish it.
| A．has been built | B．is being built | C．is built | D．is building |
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