Sugar is uncountable; therefore, the sentence has a singular verb. Marbles are countable; therefore, the sentence has a plural verb. 3. Compound subjects joined by and are always plural. 4. With compound subjects joined by or/nor, the verb agrees with the subject nearer to it.
Panic disorder causes panic attacks spontaneous feelings of anxiety, terror, or impending doom. Physical symptoms include heart palpitations, chest pain, and shortness of breath. These attacks may be repeated at any time. People with any type of anxiety disorder may have panic attacks.
1 Test anxiety can lead to a panic attack, which is the abrupt onset of intense fear or discomfort in which individuals may feel like they are unable to breathe or having a heart attack. 2  Emotional symptoms. 3  Feelings of anger, fear, helplessness and disappointment are common emotional responses to test anxiety.