1. My uncle, ____ is a computer programmer, works at New York’s Columbia University.
A. whom
B. whose
C. who
D. which
2. The whole incident was captured ____ CCTV at the shopping mall yesterday.
A. at
B. on
C. in
D. above
3. Internet users often suffer various risks, such as spam or ____ junk mail.
A. scientific
B. electric
C. electronic
D. traffic
4. In 2019 Brunie has a ____ of just over 439,300.
A. currency
B. collection
D. religion
D. population
5. Last weekend, Ba invited Liz to join his family on a ____ to his home village.
A. two days trip
B. two-day trip
C. trip of two-day
D. two-day’s trip