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 (51)c_________it?
David: About two years.
Susan: How many (52)o______ you are making the trip?
Susan: (53)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 (54)c__________ Protecting the Red-Crowned Crane.
Susan: That sounds great. Good (55) l____________ with your trip.
【答案】 46．Spent 47.Once 48.less 49.helpers 50.symbol
51.complete 52.of 53.Why 54.called 55.luck