By this time next summer, you your studies.
Giải thích
cấu trúc By this time next (week/ year/ summer...), S + V (tương lai hoàn thành-will have PII).
Chọn D
cấu trúc By this time next (week/ year/ summer...), S + V (tương lai hoàn thành-will have PII).
Chọn D