题文
A lot of banks are ________ to the new electronic system because it's more efficient.
| A．switching on | B．switching off |
| C．switching over | D．switching from |
推荐试卷
A lot of banks are ________ to the new electronic system because it's more efficient.
| A．switching on | B．switching off |
| C．switching over | D．switching from |
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