根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
We live in the Internet age when much business is conducted online. How shall we mark the special occasions？____There are numerous websites available online that specialize in electronic cards，or ecards in short.
____Cards have been a popular way to express one's feelings and gratitude. Earlier，there were traditional cards handpicked for special occasions but now，those are being replaced by ecards. Ecards are friendly in the world，which means you can send them to anyone around the world，to your friends，relatives，family，cousins，children，colleagues and numerous others.____There are Thank You Cards，Birthday Cards，Invitation Cards，Romantic Cards，Seasonal Cards Congratulation Cards，and Cards For Special Events. In other words，you have cards for any occasion. Many sites offer the cards free.____Almost all the ecards are available online for print. If you have an office party and want to make it exceptional，printable Invitation Cards are not difficult to find. You can also give them printable Thank You Cards and then Congratulation Cards to honor the best colleagues for their contributions and efforts._ ____ Just register with an online ecard website，look through the different kinds of cards，select your cards，download and print the cards you like. You get everything，basically nothing spent at your side.
With ecards，send your messages and best wishes to any person around the globe.
A．Why do we send cards anyway?
B．Ecards are in fashion these days.
C．What types of cards are there?
D．Where can we find the suitable cards we like?
E．Therefore，what do you need to do to print ecards?
F．Ecards are more convenient than traditional cards.
G．In addition，you also have printable ecards and those are free too.
