A. Nor
Đáp án B
“ keep tabs on” ~ keep records of : theo dõi, kiểm soát
Đây là một khẩu ngữ: keep a tab (tabs) on something (somebody): theo dõi kiểm soát ai, cái gì
Scientists are unsure of the reason for this (70)_______ on the global scale either.
In this way, we can put you in a (59)_________ at the most suitable level.
At 23 he move to Atlanta and took (52) _________ odd jobs as he started working on his stage career.