问题: 关于主动／被动语态
将下面的句子变为主动语态,必要时加上适当主语.
1.Some new oil fields have been opened up since 1976.
2.So many new buildings have been put up since 1990.
解答:
1.They have opened up some new oil fields since 1976.
2.They have put up so many new buildings since 1990.
版权及免责声明
1、欢迎转载本网原创文章，转载敬请注明出处：侨谊留学（www.goesnet.org）；
2、本网转载媒体稿件旨在传播更多有益信息，并不代表同意该观点，本网不承担稿件侵权行为的连带责任；
3、在本网博客/论坛发表言论者，文责自负。
