当前，祖国内地和香港的发展都处在一个新的历史起点上。我们既面临着难得的发展机遇，也面临着严峻挑战。（ ）
选项：

A:We are now standing at a new historical juncture in the development of both the mainland and Hong Kong and are facing rare opportunities for development and severe challenges.
B:Both the mainland and Hong Kong are now at a new historical starting line in their development endeavor. We face both rare opportunities of development and grave challenges.