_________ an old woman,the room was empty.

I don’t think I’ll need any money but I’ll bring some _____ .

 The class __________ 80 students is hard to manage.

In those days, we had no phones, so we have to keep in touch _________ writing often.

The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent _______ cause a series of explosions of the nuclear reactors in several power stations.