21．When did Lucy get the letter from Sophie？
A．Last Thursday．
B．Last Friday．
C．Last Sunday．
22．How long has Sophie been in Washington？
A．For about a month．
B．For about two months．
C．For about three months．
23．How does Sophie think of her new job？
A．Boring．
B．Tiring．
C．Interesting．
24．Why can't Lucy go to Sophie's Christmas Party？
A．Because she is busy with her work．
B．Because she has to visit her grandfather．
C．Because her grandfather will come to visit her family．
25．Where is Lucy now？
A．In New York．
B．In London．
C．In Sydney．