Iwanttowritearticleaboutthegre

--I want to write __________ article about the great inventors in the world. Can you help me?
--Sorry, I don’t know much about __________ topic.

A．an; a

B．an; the

C．the; a

D．the; the

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This magazine ______ out _____ the morning of March 1^st.

A．came, in

B．came, on

C．was come, in

D．was come, on

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The old man was seen _______ in the park at 7:00 a.m. yesterday.

A．exercise

B．exercised

C．to exercise

D．exercising

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______ a host of the show is really ___________.

A．Being, a hard work	B．To be, hard-working
C．Being, work hard	D．To be, work hard

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--- Where is your mother?
--- She has ______ to Sichuan on business. She has ______ there four times recently.

A．gone, gone

B．been, been

C．gone, been

D．been, gone

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It ____ over 10 years since my grandpa _______.

A．is, died

B．is, has been dead

C．has been, was dead

D．was, has died

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