concentrate on = pay all attention to (chú ý tới ….)
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CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
The Freephone 24 Hour National Domestic Violence Helpline is a national service for women experiencing domestic violence, their family, friends, colleagues and others calling on their behalf.
These projects have proved to be very effective in dealing with global climate change, which was considered an insoluble problem in the first 30 years of this century.