-Thereisalotofsmokecomingoutoftheteachingbuildingthere．-Really？Itbeafire，mostprobably．（）A.canB.shouldC.havetoD.must
-There is a lot of smoke coming out of the teaching building there．
-Really？It _____ be a fire，most probably．（ ）
A. can
B. should
C. have to
D. must
\u7b54\u6848\uff1aD\uff0e\u8003\u67e5\u60c5\u6001\u52a8\u8bcd\uff0e\u53e5\u610f\"--\u6709\u5f88\u591a\u70df\u4ece\u6559\u5b66\u697c\u90a3\u51fa\u6765\uff0e--\u771f\u7684\u5417\uff1f\u80af\u5b9a\u662f\u7740\u706b\u4e86\uff0c\u770b\u6765\uff0e\"\uff0ecan\u80fd\uff0eshould\u5e94\u8be5\uff0ehave to\u4e0d\u5f97\u4e0d\uff0emust\u5fc5\u987b\uff0e\u6839\u636eThere is a lot of smok\u6709\u8bb8\u591a\u70df\uff0c\u53ef\u77e5\u4e00\u5b9a\u662f\u7740\u706b\u4e86\uff0e\u8bed\u6c14\u6bd4\u8f83\u80af\u5b9a\uff0c\u7528must\uff0e\u7b54\u6848\u662fD\uff0e" "latex":"
\u7b54\u6848\uff1aD\uff0e\u8003\u67e5\u60c5\u6001\u52a8\u8bcd\uff0e\u53e5\u610f\"--\u6709\u5f88\u591a\u70df\u4ece\u6559\u5b66\u697c\u90a3\u51fa\u6765\uff0e--\u771f\u7684\u5417\uff1f\u80af\u5b9a\u662f\u7740\u706b\u4e86\uff0c\u770b\u6765\uff0e\"\uff0ecan\u80fd\uff0eshould\u5e94\u8be5\uff0ehave to\u4e0d\u5f97\u4e0d\uff0emust\u5fc5\u987b\uff0e\u6839\u636eThere is a lot of smok\u6709\u8bb8\u591a\u70df\uff0c\u53ef\u77e5\u4e00\u5b9a\u662f\u7740\u706b\u4e86\uff0e\u8bed\u6c14\u6bd4\u8f83\u80af\u5b9a\uff0c\u7528must\uff0e\u7b54\u6848\u662fD\uff0e"}
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