1£®To save the drowning child£¬the boy plunged into the icy water without hesitation£¬________his own safety.
A£®despite of¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B£®regardless of
C£®unaware of D£®because of
2£®The weather in London is so changeable that people always take their umbrellas with them________rain.
A£®for fear of B£®in need of
C£®in spite of D£®because of
3£®Without electronic computers£¬much of today’s advanced technology________.
A£®will not have been achieved
B£®have not been achieved
C£®would not have been achieved
D£®had not been achieved