Đây là mệnh đề quan hệ xác định hay không xác định: The animal liberation league, whose opinion was criticized by senior politicians, failed to get their views acted upon.
MĐQH Không xác định
Điền ĐTQH thích hợp: The wildlife photos __________ my sister took in Borneo were the best photos I had ever seen.
which/that
Điền giới từ thích hợp: There has been an increase ___ the number of Internet users.
in
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