to be knowledgeable about ...
Verb
to keep abreast of …
Verb
to know one's way about
Verb
to have a thorough knowledge of sth
Verb
to know one's onions
Verb
to be well grounded in sth
Verb
to be clear about sth
Verb
to be given notice of
Verb
to have a thorough knowledge of sth
Verb
to have someone on the tape
Verb
to think highly of sb
Verb
to have low (poor) of sb
Verb
to know something inside out
Verb
to know something backwards
Verb
to look at something
Verb
to have secret c a of the enemy's plans
Verb
to be a difficult man to place
Verb