一、根据句意,选取括号中正确的词语填空。
1.Could you tell me ___________ (where, where to) buy this fruit ?
2.I went there ___________ (to see, saw) him .
3.I’ll show you ____________ (how to do it, how to do) .
4.My plan is ___________ (to do ,do) the work next week ....