你可能感兴趣的试题
there were has there been there has been were there
preserved treated prevented stayed
demand master history performance
there were has there been there has been were there
has been open has opened has been opened has been on
has been open, will close has opened, closes opened, will close has been opened, is closing
comparing several current interpretations of early American history. providing the theoretical framework that is used by most historians in understanding early American history. refuting an argument about early American history that has been proposed by social historians. discussing a reinterpretation of early American history that is based on new social research on migration.
human being humankind protagonists mankind
built is built was built has been built
present evidence that is intended to refute the argument of the history discussed. summarize the main point of the history discussed in the passage. explain why the history discussed in the passage has been blamed by critics. introduce a hypothesis that will be discussed in detail later in the passage.
A.——;a the ; a the ; the / ; /
A. has been there there has been has there been there been has