从a、b、c、d四个选项中,选出可以填入空白处的最佳选项。 1. —better get down to your work, jack. — . a. it’s my pleasure b. not to mention it c. mind your own business d. you’re welcome 2. i ________ be slow, but at least i don't make such stupid mistakes. a. must b. need c. should d. may
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