The famous actor keeps fit and athletic by at the gym for an hour every morning.A. making

问题补充：

The famous actor keeps fit and athletic by at the gym for an hour every morning.

A. making out

B. figuring out

C. working out

D. turning out

答案：

A. making out

B. figuring out

C. working out

D. turning out

解析： 句意：这个著名的演员通过每天早上在体操房锻炼一个小时保持健康健壮。四个选项的的含义分别是：A. making out 辨认出，理解，B. figuring out弄明白，C. working out制定出，锻炼，D. turning out结果是，根据句意选C。