1．A spaceship flies at about eleven kilometers _______ second.
A．/ B．the C．a D．an

2．_______ India and China are of _______ same continent.
A．/; the B．The ; the

C．/; / D．/; a

3．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

4．As _____ writer, he was _____ complete failure.
A．a, a B．a, the

C．不填，不填 D．a, 不填

5．How strange! These years my birthday always falls _____.
A．on the Sunday B．on a Sunday

C．on Sunday D．at a Sunday

6．This is _____ best kind of _____ pen you can get here.
A．the, the B．the, a

C．the, 不填 D．a, the