2019年mpacc考试英语真题——连词58

{01}The big fire lasted as long as 24 hours ________ it was brought under control．
A.after
B.before
C.since
D.while
解析：
本题选B。
{02}Mike was ill; ________, he went to work as usual in spite of his illness．
A.but
B.therefore
C.however
D.otherwise
解析：前后句表转折关系，因此排除B、D两项；but可直接连接两个分句，后面不用逗号；however不能直接连接两个分句，后须有逗号。句意为：迈克生病了，然而，他不顾疾病仍然像往常一样去上班。
本题选C。