Question

英语选择题

The research is so designed that once___nothing can be done to change it.
A.begins B.having begun C.beginning D.begun
Playing tricks on others is ___we should never do.
A.anything B.something C. everything D.nothing
Having a trip abroad is certainty good for the old couple,but it
remains___whether they will enjoy it.
A.to see B.to be seen C.seeing D.seen

这三题该选什么?请各位高人指点..并解析一下...!!本人不胜感激~~

Answer 1

1. D once begun = once it is begun一旦开始
2。B 因为playing tricks是一件事情，而something的含义是”某件事”，其它不表示一件事情，所以答案为B。
3。B it remains to be seen有待观察。it与see有被动关系。

Answer 2

D B B