___________ is he? He’s having supper in the kitchen.
A.Where
B.What
C.Who
--What color is your skirt? -- ________
A．It's yellow． B．It's expensive． C．It's old．
-- ________ does your father work? --He works in a school．
A．What B．Which C．Where
My sister is ________ TV．
A．watch B．watches C．watching
--Thank you for your help． -- ________
A．Really? B．No，thanks． C．You're welcome．
It's ________ black．It's ________ black ear．
A．／；／ B．a；／ C．／；a