*they are to *??和另2條英文題目

1.The migrant labourers are as indispensable to their home provinces as they are to the factories,________Filipino workers in Hong Kong who repatriate income earned overseas. B.performing a role similar to that played by D.competing with ***這題答案是B 定D ? 同要解釋~thx 而且這題*they are to the factories*是什麼意思?句式甘怪 同*I AM... show more 1.The migrant labourers are as indispensable to their home provinces as they are to the factories,________Filipino workers in Hong Kong who repatriate income earned overseas.
B.performing a role similar to that played by
D.competing with
***這題答案是B 定D ? 同要解釋~thx
而且這題*they are to the factories*是什麼意思?句式甘怪
同*I AM TO DO..*句式有什麼不同(識就答)

2.The authorities,with plenty of practise behind them,now deploy a range of tools to manage this mass movement,from raising the price of tickets (transports) and having people start their holidays at different times __________Where these policies fail,tough crowded control is necessary.
A.so they have no chance to go.
B.in a variety of countrries.
C.to adding extra transport services.
D.to increase congestion.
請說出答案+解釋為什麼?同*from..to*有關?
**仲有在這題文中*Where*指什麼?

thx very much
3 answers 3