Vấn đề 4đáp ngắnWhat had you been doing when the power went out in the past perfect continuous tense?Reading
Vấn đề 7đáp ngắnWhat had the team accomplished by the end of the season in the past perfect tense?Championship
Vấn đề 10đáp ngắnWhich famous scientist developed the theory of relativity in the past simple tense?Einstein