-I haven’t got the reference book yet, but I’ll have a test on the subject next
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—I haven’t got the reference book yet, but I’ll have a test on the subject next month.（ ）
—Don’t worry. You ______ have it by Friday.
A. could B. shall C. must D. may
试题答案
B
shall在第二人称中表示允诺，还可以表示强制，命令，威胁，警告。还有在法律条文中的要求或规定。