10．The doctor told his patient to have examinations ______(定期地)．

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9．To ______(保证) safety, the train is controlled by an advanced computer system.

8．Many companies have already begun ______(改革) the way they do business.

7．No one can ______(预测) what will happen in the future.

6．The problem being discussed is of great ______(重要)．

5．According to the weather ______(预报), it’s going to stay hot for the rest of the week.

4．It would be ______(荒谬的) if it were not so unlikely.

3．The ______(确切的) date of the event has escaped me.

2．She made many ______(购买) at the department store.

1．I am ______(抱希望的) that he will arrive early.