1. Man,no less than the lower forms of life,_______________(是演化過程的產物).
2. _______________(不止一個人覺察到)her agitation.
3. ________________(液體密度越大),the easier it is to float on it.
4. _______________(只有工人的要求得到滿足)will they return to work.
5. Had ________________(要不是有水庫)we'd never have been able to beat the drought.