【单选题】Niagara is an Indian word, which means 'roaring water'. Indeed, the roar of the【C1】______water of Niagara can be heard within a distance of 5 kms.【C2】______a mass of water flowing over a cliff 90 feet...
【简答题】Write down the correct word with the initial letter given. W ord D efinition 1. d_____ very different from each other and of various kinds 2. q______ a number or an amount 3. r_______ to make someth...