题目内容
---How long has this shop _____?
---For about three weeks.
| A．opened | B．been open |
| C．been opened | D．open |
B
解析试题分析：句意：这家商店开业多长时间了？大约三周了。how long 句子中不能用短暂性动词open开业；been open表示是开业的状态，可以持续。故选B。
考点：考查动词时态。
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