30. _____ any emergency, report to the office and call the police immediately.
(A) If there has
(B) If there be
(C) There should be
(D) Should there be

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統計： A(116), B(60), C(22), D(123), E(0) #2752140

詳解 (共 2 筆)

#4993914
與未來事實相反的假設語氣  If + ...
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#5730628

Should表「萬一」

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