startle perspective shape hard positive response prior accomplish issue address crisis incredible conversely curse rare 11) The next big_________ confronting the workers is the question of social security (社会保险). 12) I wrote to them a month ago but haven’t gotten a _________ yet. 13) I shall have to refuse your invitation because of a _________ engagement. 14) There used to be various kinds of birds here, but now they are_________ due to lack of food resources. 15) Is it true that visualizing a task by positive thinking helps to _________ the task better?