Bộ câu hỏi: Thì và sự phối thì (Phần 1) (Có đáp án)

There an increase in the number of tourists to Dia Tang Pagoda since its images appeared

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There ______ an increase in the number of tourists to Dia Tang Pagoda since its images appeared in some social networking sites.

had been

were

has been

will be

Giải thích

Chọn C