it was very dark ,so they turned on a torch.so是副词还是连词,怎样区分

it was very dark ,so they turned on a torch.so是副词还是连词,怎样区分 It was very dark,so they turned on a torch.这里为什么要用on a torch It was very dark.He turned on the lights.[将两句话合成一句】 It was very dark.he turned on the lights.（将两句合为一句) How dark it was!It was so _____ that he was very careful and They carried on ------------ though it was dark They were deep in the mountain and it was getting dark ,so t very,so,too,quite修饰的是形容词还是副词? 3.______ the torch,please.It’s too dark here.A.Turn on B.Tak it was so dark outside that he___go out alone. A.dared not t they worked hard on the farm t_____it was very dark It was too dark,so i could h___ see anything.