As is recorded in history, silkworms（蠶）were first raised by a woman in _________ is today Hebei Province．
A．whereB．the placeC．whichD．what
D
主要測試賓語從句。從句子的語境來看可知介詞in需要賓語，同時句子_________ is today Hebei Province中有需要主語，另外結(jié)合答案可知只有what可以充當此雙重作用，當然如果B后接that 或which也是正確的，但是那就變成了定語從句。
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