Choose the best answer to complete the blank in each of the following sentences.
That machine is useless. It ________not been used for a long time
is was did hasMôn học
Chủ đề / Chương
Bài học
Chủ đề
Choose the best answer to complete the blank in each of the following sentences.
That machine is useless. It ________not been used for a long time
is was did has
