题目内容
How long do you think_________Obama officially takes office in the White House?
| A.it will be that | B.will it be until |
| C.will it be when | D.it will be before |
D
It will be +时间名词+ before 意为“一段时间以后才”。do you think为插入语,整句话用陈述语序。
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