100 câu trắc nghiệm Thì quá khứ hoàn thành tiếp diễn (Past Perfect Continuous) có đáp án
Xem toàn bộ quiz

The kids were exhausted in the evening because they ________ (help) on the farm all day.

30/100

The kids were exhausted in the evening because they ________ (help) on the farm all day.

had been helped

had been helping

helped

help

Giải thích

Chọn đáp án: B