Could you tell me _________？
Oh， she is the world's first robot citizen， Sophia．（ ）
A．what the tall girl is
B．what is the tall girl
C．who the tall girl is
D．who is the tall girl
We experienced a few moments as we waited to hear the results of the test．（ ）
A．pleasantB．anxious
C．hopefu1D．disappointing
What are you doing？
I'm looking ______ the kids． They should be back for lunch now．（ ）
A．afterB．atC．forD．up
Do you still play basketball？
Oh， no． I ______ it for the past three years．（ ）
A．haven't playedB．didn't play
C．won't playD．hadn't played
I still don' t know what____ while I was away from home．
You'll know it all some day， l believe．（ ）
A．had happenedB．would happen
C．has happenedD．happened
My sister______ the piano very well， but she hasn't had time to play recently．（ ）
A．will playB．has playedC．playedD．plays