根据对话意思和所给首字母,写出完整正确的单词。 Susan: Where are you going, David? David: To Beijing? Susan: It's a long trip from here by bike. How long will it take you to (1)c_________it? David: About two years. Susan: How many (2)o you are making the trip? David: Five. Susan: (3)W_________are you making it? David: We are trying to collec some money. Susan: What will the money be used for? David: To a charity (4)c__________ Protecting the Red-Crowned Crane. Susan: That sounds great. Good (5) l__________ with your trip. David: Thanks.