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 小题1:c_________it?
David: About two years.
Susan: How many小题2:o______ you are making the trip?
David: Five.
Susan: 小题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小题4:c__________ Protecting the Red-Crowned Crane.
Susan: That sounds great. Good小题5:l____________ with your trip.
David: Thanks.
