The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

Do you check your work emails when you're on holiday? Do you call your colleagues to ask what's happening in the office even on a day off? When you see no signal on your mobile phone in a busy shopping centre or no wifi in the hotel by the beach, will you get anxious?

Typical signs of a （）