“I have to go,” she said, and with ______ she hung up the phone.

－How is Helen in the new school?－She is doing very well. There is         to worry about.

One of the most important problems they had to consider was________of public health.

The most energetic and important festivals are _____that look forward to the end of winter and to the coming of spring.l

 That place is not interesting at all. ______ of us wants to go there.