Sam _________to change a light bulb when he _________ and _________ .
A. was trying/slipped/fell
B. tried/was slipping/had fallen
C. have been trying/slipped/was falling
D. has tried/slips/falls
#Phân tích giúp em các câu đúng và sai luôn ạ
Sam _________to change a light bulb when he _________ and _________ .
A. was trying/slipped/fell
B. tried/was slipping/had fallen
C. have been trying/slipped/was falling
D. has tried/slips/falls
#Phân tích giúp em các câu đúng và sai luôn ạ
Câu hỏi mới
– Giải đáp C -> Sai cấu trúc