It seems that living green is ________ easy andaffordable A small step makes a big difference

ys, sending e-mails to each other has become a way _____ what they think to others.

下列各句中，没有语病的一句是（ ）

In our life, one question that ____ comes up is:“to be or not to be?”

The man spoke loudly in public in order to _______ others’ attention.