keep

your cards close to your chest

an eye out for sth.

your eyes peeled

your hands clean

sb. guessing

a low profile

up with the times

sb. on their toes

将商业计划保密

密切注意某事

密切注意某事

不接受贿略或卷入贪污

让某人猜测

避免引人注意

跟上潮流;注意时事

不让别人知道你下一步要做什么