问题

Beijing ________ a lot over the years. Now it has become one of the biggest ______ in the world.
A:changes; cities
B:changed; city
C:has changed; cities
D:changed; cities;
B:changed; city
C:has changed; cities
D:changed; cities;
正确答案是:
同类题型
ter was now two feet deep, making it difficult, if not impossible, _________ the car out.
She walked home by herself, ______ she knew that it was dangerous
Lucy has a great sense of humor and always keeps her colleagues with her stories.
The exact year Angela and her family spent together in China was 2008.