in (x2), with (x2), of (6), for (x2), over, to, by, on special, specially, best, easily, unsuitable, available
The materials _in_ class A fires are _best_ extinguished _with_ water. The range _of_ equipment _available_ _for_ attack allows the successful extinguishment _of_ almost any size _of_ fire _with_ the minimum amount _of_ damage.
Dry powders are also effective but unless there are special considerations such as rapid–spreading surface fire they are messy and expensive and have no advantage _over_ water. Carbon dioxide is not _specially_ suited _for_ class A fires and _in_ the absence _of_ special hazards it should not be generally used. However, there are _special_ cases where total flooding systems are used to protect valuable goods which could be __easily_ damaged _by_ water. Foam and vaporizing liquids are _unsuitable_ _to _ use _on_ this type _of_ fire and should not be used.
2). I was going to the cinema at four o’clock yesterday.
3). My sister wasn`t playing the piano at four o’clock yesterday.
4). She was cooking the whole day yesterday.
5). We washed the floor in our flat yesterday.
6). Did you do your homework yesterday?
7). Were you doing your homework from eight till ten yesterday?
8). I did my homework yesterday.
9). I didn`t play the piano yesterday.