Question

问几个高中英语单选 要详细讲解

1.The research is so designed that once _____nothing can be done to change it. A.begins B.having begun C.beginning D.begun 2.I would appreciate_____back this afternoon. A.you to call B.you call C.your calling D.you're calling 3.The managers discussed the plan that they woukd like too see____the next year. A.carry out B.carring out C.carried out D.to carry out 4.The mayor of Beijing says that all construction work for the Beijing Olympics_____by 2006. A.has been completed B.has completed C.will have been completed D.will have completed........ 答案我都有 主要是讲解 书上没具体解释 鄙视下 新申请的号 分不多 大家见谅

Answer 1

1.
D.begun
这里是过去分词短语once
begun做状语。主语The
research
与begin这个动作逻辑上是被动关系。
2.C.your
calling
appreciate
+动名词的复合结构为正确表达。另尚有appreciate
sth.的用法。而无appreciate
sb
to
do
sth.
3.C.carried
out
see
sth+过去分词为正确表达。
因为plan是被人完成的。
4.C.will
have
been
completed
这是在考你将来完成时态。说这句话的时间应在2006年之前。如2005，2004句子才成立。
另“by+某个时间”是完成时态的重要标志。但至于是过去完成时，现在完成时或将来完成时则取决于后面的时间点。