题干
The exam is coming, so I am doing my ________ to work hard ________ Japanese.
A：better; with
B：best; at
C：well; to
D：best; with
答案(点此获取答案解析）
B
The exam is coming, so I am doing my ________ to work hard ________ Japanese.
A：better; with
B：best; at
C：well; to
D：best; with
，则
是方程
表示双曲线的（ ）条件
