For most informal dinners，you should wear comfortable，______  clothes. 

The knowledge that I had caused him to lose his job made me bitterly ______.

Security cameras are restricted to ________ spaces，such as hallways and exits.There will be no cameras in classrooms，locker rooms(更衣室)or bathrooms.

Recently our government policymakers are very ______ about the rapidly rising food cost.

–Have you received Jack’s plan?--Yes, but I don’t think his plan is _____.