下列各组词语中，没有错别字的一组是(　　)

House prices keep rising these days. A flat in our city costs ____ now as in 1990.

Mr. Wu said he ______ us to the zoo the next week.

na’s space technology has achieved____ breakthrough in this field, it really is ____ amazingwonder.

Tom asked ___ to ride to the museum with him, Sally.–OK. But we’d better go by bus. ____ will take one and a half hours by bike.