— should teenagers spend at least 30 minutes taking exercise?—Five times a week,according to some reports.
Her name is Mary Green. Mary is her _______ name.
---- Is this your pen?---- _________. It’s her pen.
-----Your bag is very nice.----___________.
当你称呼李老师(男)时,应如何称呼?__________.
----Hello! My name ______ Cindy.----Hi! I ______ Gina.