1 . Setting aside your devices and clearing your mind of your own thought are good first steps. By ______ those, it’s easier to give your complete attention to the speaker.

A．eliminating

B．clarifying

C．responding

D．emerging

2 . It is challenging to ______ between colds and allergies because allergies often mirror the symptoms of colds. In fact, many cold and allergy symptoms are the same.

A．expose

B．distinguish

C．contrast

D．uncover