Crutzen has suggested that the Antropocene began in the late 18th century, when, ice cores show, carbon dioxide levels began what has since proved to be an interrupted rise.
此处的ice cores show为什么要作插入语,另外有begin后可以接宾语分句吗?
How silly it is to travel out by high-speed rail _____you can take a plane,whichis much cheaper.A.while B.when C.since D.though答案选B,可是C有既然的意思也能说通为什么不选?
Parents are regarded as being responsible for the control of their children.请问老师, as being responsible 和 for the control of their children 这2部分分别是句子的什么成分?
Travelling is one of those few activities that have a reset button in
our lives. You are away for a few days or weeks and come back fresh and ready
to take on new challenges in life.这里的fresh and ready用在come back后面,是否可以表示一种伴随状态?