Compared with his sister, Jerry is even more_____to, and more easily troubled by , emotional and relationship problems.

This washing machine is environmentally friendly because it uses _____water and electricity than _ ___models. 

As we know, Jean is a       investor（投资者）who studies the market before he buys things. 

Sometimes they may play to passers-by in the street or subway so that they can earn some______ money for themselves or to pay for their instruments.

----- The film is, I have to say, not a bit interesting. ----- Why? It’s _______ than the films I have ever seen.