填空题

He explained that he (have)（）difficulty in finding a bus that late hour.

【参考答案】

had had

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填空题

The news of the popular singer’s arrival received (extend)（）coverage in the newspaper.

单项选择题

（）that they may eventually reduce the amount of labor needed on construction sites by around 90 percent.

A. So clever are the construction robots
B. So clever the construction robots are
C. Such construction robots are clever
D. Such clever construction robots are