Chủ đề:
Luyện tập tổng hợpCâu hỏi:
4.Dan couldn't do his homework on his own (himself)
-Dan couldn't..............................................................
7.He always tries to finish his work on time (effort)
-He always..................................................................
8.It took Mr.Hoang half an hour to walk to work to yesterday
-Mr.Hoang spent............................................................