Lisa remembered________her mother．But her mother hash’t received the letter．
A．to write
B．writes
C．writing
D．wrote
I will congratulate him________winning the singing competition．
A．of
B．with
C．on
D．in
She wants to learn more about American history．She is thirsty________such knowledge．
A．at
B．of
C．for
D．with
Try singing some English songs，and you’ll find it interesting________a foreign language．
A．learning
B．learns
C．learn
D．to learn
The more you smile，the________you will feel．
A．happy
B．happier
C．happily
D．more happily
—I can’t stop smoking，doctor．
—For your health，I’m afraid you________．
A．may
B．can
C．have to
D．need
