问题补充：
a host of the show is really .
A. Being, a hard work
B. To be, hard work
C. Being, work hard
D. To be, hard-working
答案：
A. Being, a hard work
(答案→)B. To be, hard work
C. Being, work hard
D. To be, hard-working
解析：此题重点考查动词的非谓语形式，又因work是不可数名词故选B。
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