单项选择题

According to Mr. Akins, we can do nothing but ______ doing what we've been doing till further notice, or we'll probably mess up the situation.

(A) keep
(B) to keep
(C) keeping
(D) keeps
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单项选择题
Happy Chicken Farm, which has been in business for ten years, ______ our customers with the freshest and best-tasting eggs available.
(A) offers
(B) gives
(C) brings
(D) provides
单项选择题
Make sure that all the papers ______ proofread for grammatical and content errors before submitting them to the boss.
(A) will be
(B) were
(C) are
(D) has been
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