.The accident is reported to have occurred _______ the first Sunday in February.选一个答案

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.Theaccidentisreportedtohaveoccurred_______thefirstSundayinFebruary.选一个答案.Theaccidentisreportedtohav

.The accident is reported to have occurred _______ the first Sunday in February.选一个答案
.The accident is reported to have occurred _______ the first Sunday in February.
选一个答案

.The accident is reported to have occurred _______ the first Sunday in February.选一个答案
填介词on,
在具体的某一天(某日）前用on.在某年,某月,某季节前用in.