This policy encourages companies to introduce new technologies take part in the Internationalcompetition.[ ]

下列各句中，没有语病、句意明确的一句是（ ）

The series of TV programme focus on a group of engineers who their lives to China’s nuclear research and space program between the late 1960s and the early 1990s.

It was not until dark he found he thought was the correct way to solve the problem.

Please ______ away this cup ofte