2019年mpacc考试英语真题——连词68

{01}Alxander Ferguson was a worker on shipyards ________ he was 23, ________ he began to play professional football．
A.when; when
B.until; when
C.when; which
D.where; when
解析：考查连词。句译为：Alxander Ferguson直到23岁还是一名船厂工人，(但)这时他开始专业踢球了。until“直到……时候才(不)……”；when“当……时候”。
本题选B。
{02}Although it was not named _________ 1782, this kind of metal was used as early as 5300 BC.
A.in
B.for
C.until
D.since
解析：
本题选C。