【推荐1】After        series of failures, Jack managed to pass        driving test.

A．a; a	B．a; the
C．不填; a	D．the; a

【推荐2】A recent study has come up with _____ unexpected conclusion that ____ Africa elephants should be divided into two different species.

A．a, the

B．an, the

C．an, an

D．the, the

【推荐3】— Oh, must you? Stay a bit longer. It has been such ________ fun having you.
— Thanks. Anyway, I’ve got ________ early start tomorrow morning.

A．a; an

B．/ ; an

C．/ ; the

D．the; an

【推荐1】Beijing’s bid for ______2022 Winter Olympics has driven public enthusiasm for winter sports to ______ new heights.

A．a; the

B．/; /

C．the; /

D．/; the

【推荐2】Awarded ______ 2012 Nobel Prize in Literature, Mo Yan, ______ productive contemporary Chinese writer, has published dozens of short stories related to the countryside.

A．a; a

B．the; a

C．/; a

D．a; the

【推荐3】—What do you think of_______ Christmas party?
—It was great.

A．a

B．the

C．不填

D．an