单项选择题A．The spacecraft will fly direct to Mercury.B．The spacecraft will fly three times past Mercury.C．The spacecraft was launched a week later than planned.D．There is no specific task for this journey.

单项选择题A．they like investmentsB．they like challengesC．they like the jobD．they like the rural area

单项选择题A．sixB．nineC．twelveD．sixteen

单项选择题A．speechesB．mournful musicC．paradeD．visit

单项选择题A．Eastern EuropeB．Northern EuropeC．Western EuropeD．Southern Europe