by some it is supposed that bad luck may be avoide...

Câu hỏi: by some it is supposed that bad luck may be avoided by locking on wood.

A if bad luck is coming , it will be destroyed provided that one knocks on wood.

B there are some people who believe  that it is bad luck to avoid knocking on wood

C bad luck is said to be preventable by knocking on wood  sometime

D that  knocking on wood can keep bad luck away is believed by some people