I. 单项选择（每题1分， 总分35分）
1. Brussels, the capital city of Belgium, is ______ home to the European union, ____organization of European nations.
A. the , an B. / , an C. a, an D. / , the
2. Though a typhoon is on the way, people are still looking forward _____ the outdoor concert by the pop singer.
A. to canceling B. not to canceling C. not to cancel D. to not canceling
