阅读下面短文，掌握其大意，然后从所给的A、B、C、D四个选项中，选出最佳选项。
Nancy had just got a secretary's job in a big company to work in the sales department. Monday was the first day that she went to work, so she was very 　31 .She got up very early and arrived at the 　32　 at twenty to eight. She 　33　 the door open and found nobody there. “I am the 　34　 to arrive.” She thought and came to her desk. She was surprised to 　35　a large bunch of flowers on it. They were fresh. She 　36　 the flowers from the desk and smelled them. “Oh, how lovely!” Nancy 　37　 joyfully. She then looked round for a 　38　 to put them in. “Somebody has sent me flowers the 　39　 first day!” She thought happily. “But who could it be?” She began to wonder.
The day passed very 　40　 and Nancy did everything with great interest and 　41　 .For the following days of the week, the first thing Nancy did was to change water for the flowers. And then she 　42　 herself in her work.
Then came another Monday. When she came near her desk she was overjoyed to see a(an) 　43　 bunch of flowers there. She quickly put them in the vase, replacing the old ones.
The same thing happened again the next Monday, Nancy felt it 　44　 and this time she began to think of ways to find out the 　45　 .
On Tuesday afternoon, she was sent to 　46　a plan to the general manager's office. She had to stay for a while at his secretary's desk 　47　 his directives .She happened to see on the desk a big note book 　48　 “Records of managers' meetings”, and glanced at the 　49　 pages. Suddenly her eyes fell on these words: “In order to keep the secretaries 　50　 ,the company has decided that every Monday morning a bunch of fresh flowers should be sent to each secretary's desk.”
Later, she was told that their general manager was a business management psychologist.

A．depressed B．encouraged C．excited D．surprised

A．office B．workshop C．Classroom D．bookshop

A．forced B．pushed C．Turned D．knocked

A．last B．second C．Third D．first

A．uncover B．smell C．Find D．pick

B．threw away C．stared at D．took up

A．cried B．Laughed C．wept D．replied

A．jar B．Box C．bottle D．vase

A．happy B．very C．funny D．quite

A．slowly B．normally C．quickly D．hardly

A．wisdom B．bravery C．passion D．enthusiasm

A．buried B．dressed C．Devoted D．seated

A．old B．Red C．blue D．new

A．special B．angry C．strange D．difficult

A．sender B．receiver C．manager D．waiter

A．send for B．hand out C．try out D．hand in

A．asking for B．waiting for C．looking for D．searching for

A．marked B．written C．printed D．signed

A．closed B．damaged C．pinned D．half-opened

A．at home B．on time C．in high spirits D．in low spirits