They will give a performance ______ . A. when their school organised the prom B. once their school organises the prom C. before their school organised the prom D. after their school had orga

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They will give a performance ______ .

when their school organised the prom

once their school organises the prom

before their school organised the prom

after their school had organised the prom

Giải thích

Hòa hợp thì:

TLĐ + liên từ + HTĐ

Tạm dịch: Họ sẽ trình diễn một khi trường tổ chức dạ hội.

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