We must ensure that tourism develops ______ harmony with the environment.

We must ensure that tourism develops ______ harmony with the environment.
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    The Chinese Space Agency has developed the _____ successful Long March rocked series.

    The Chinese Space Agency has developed the _____ successful Long March rocked series.
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      We cannot ________ the punctual arrival of trains in foggy weather.

      We cannot ________ the punctual arrival of trains in foggy weather.
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        Some people find the idea of relativity difficult to ______. I can't understand it, either.

        Some people find the idea of relativity difficult to ______. I can't understand it, either.
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          We want to rent a bus which can____ 40 people for our trip to Beijing.

          We want to rent a bus which can____ 40 people for our trip to Beijing.
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            The committee is discussing the problem right now. It will ____ have been solved by the end of next week.

            The committee is discussing the problem right now. It will ____ have been solved by the end of next week.
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              Mike didn't play football yesterday because he had ______ his leg.

              Mike didn't play football yesterday because he had ______ his leg.
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                History is a record of mankind; different historians, __________, interpret it differently.

                History is a record of mankind; different historians, __________, interpret it differently.
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                  It was not until it got dark __________ working.

                  It was not until it got dark __________ working.
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                    Before the child went to bed, the father asked him to __________ all the toys he had taken out.

                    Before the child went to bed, the father asked him to __________ all the toys he had taken out.
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                      Thinking that you know __________ in fact you don't is not a good idea.

                      Thinking that you know __________ in fact you don't is not a good idea.
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                        ."__________ does Mr. Johnson go to London on business?”“At least once a month.”

                        .
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                          . Helen was much kinder to her youngest child than she was to the others, __________, of course, made the others jealous.

                          . Helen was much kinder to her youngest child than she was to the others, __________, of course, made the others jealous.
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                            Evidence came up __________ specific speech sounds are recognized by babies as young as 6 months old.

                            Evidence came up __________ specific speech sounds are recognized by babies as young as 6 months old.
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                              He __________ when the bus came to a sudden stop.

                              He __________ when the bus came to a sudden stop.
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