【开放英语2(英语I(2))-2822网上形考机考题库】 We must take care _______________________（别让任何人知道这件事）.

【开放英语2(英语I(2))-2822网上形考机考题库】 We must take care _______________________（别让任何人知道这件事）.
A.Don’t let anyone know about it
B. not to let anyone know about it
C.whoever knowabout it