How strange! These years my birthday always falls _____.
A．on the Sunday B．on a Sunday
C．on Sunday D．at a Sunday
As _____ writer, he was _____ complete failure.
A．a, a B．a, the
C．不填，不填 D．a, 不填
The operation is _____ success and the patient is now out of _____ danger.
A．a, the B．a, 不填
C．不填, the D．不填，不填
_______ India and China are of _______ same continent.
A．/; the B．The ; the
C．/; / D．/; a
A spaceship flies at about eleven kilometers _______ second.
A．/ B．the C．a D．an
It takes me half an hour_____the piano every day.
A．play
B．playing
C．to play
