2019年mpacc考试英语真题——连词22
{01}Mary was about to go to bed ________ someone knocked at the door.
A.when
B.while
C.as
D.since
解析:when在此处表示“就在这时”,通常主句为将来时或进行时。
本题选A。
{2}They were surprised that a child should work out the problem _____ they themselves couldn’t.
A.when
B.where
C.until
D.while
解析:考查连词辨析。while是个并列连词,表示“转折”,而其它连词均没有转折之意。
本题选D。
A.when
B.while
C.as
D.since
解析:when在此处表示“就在这时”,通常主句为将来时或进行时。
本题选A。
{2}They were surprised that a child should work out the problem _____ they themselves couldn’t.
A.when
B.where
C.until
D.while
解析:考查连词辨析。while是个并列连词,表示“转折”,而其它连词均没有转折之意。
本题选D。
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