你可能感兴趣的试题
to use to be used to have used to be using
is; was; is; were are, is are; was
to use to be used to have used to be using
to use to be used to have used to be using
in the early days most American writers were from Great Britain people with rich life experiences became writers there were many writers in the early days of American history early-day experience provided the foundation for American literature
is; was written; is seen are; are written; are seen is; had been written; is seen are; were written; is being seen
to use to be used to have used to be using
to use to be used to have used to be using
in the early days most American writers were from Great Britain. people with rich life experiences became writers. there were many writers in the early days of American history. early-day experience provided the foundation for American literature.