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.
PHYSICAL SIGNS OF ANXIETY -- Headaches, short of breath, chest pressure, tightness or heaviness in the throat. NOTE: If these symptoms are mild and improve, fine. But chest discomfort and or shortness of breath, accompanied by nausea or sweating can be signs of a heart attack. Call 911 for serious symptoms.