Question

--- You look ______,Paul. What’s the matter?--- I’m having trouble ______ math.

A．tired, to learn

B．worried, learning

C．frustrated, to learn

D．angrily, learning

Answer 1

B

B 根据句意得知，Paul因不会数学题而显得担心、忧虑。故第一个空填worried；固定句型have trouble (in) doing sth.“做某事有困难”，故选B。