问题:
_____ the website of the Five Department in your city, and you will learn a lot about firefighting.
A. Having searched
B. To search
C. Searching
D. Search
_____ the website of the Five Department in your city, and you will learn a lot about firefighting.
A. Having searched
B. To search
C. Searching
D. Search
A. Having searched
B. To search
C. Searching
D. Search
参考答案: