We must be______that this year might be the worst in recent times for our economic development.

at the forest was destroyed by a bigfire, a large ________of trees ______ to be planted on the mountain．

Sarah pretended to be cheerful,_____ nothing about the argument.[ ]

StLouis has replaced Camden, New Jersey ______ the most dangerous US city, according to a study based on FBI crime data which was released Monday

There is elephant there. Near elephant，there is tall tree.