2019年mpa考试英语真题——连词285

{01}As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season. A.before B.unless C.since D.until 解析：本题考查连词。句意：因为海冰融化得比游泳者早，北极熊没来得及为整季储存足够的脂肪，就被迫提前上岸，面临食物短缺。before conj.在……之前；比……早些。
本题选A。
{02}___________ he has limited technical knowledge, the old worker has a lot of experience. A.Since B.Unless C.As D.Although 解析：考察连词辨析。A自从；B除非；C随着，因为；D尽管；结合句意可知D正确。句意：尽管她的专业知识有限，但是这位老工人经验丰富。
本题选D。