用所给动词的适当形式填空。 1. Is it difficult____(sell) cookies? 2. The children like____(eat) cookies. 3. I don't know how____(sell) the cookies. 4. I spent five dollars____(buy) the dictionary.
【单选题】Cisco Technical Support Services portfolio provide customers resources that help ensure that Cisco products operate efficiently, remain highly available, and benefit from up-to-date system software. I...