1. The test seems ……… difficult ( be )
2. Do you have ………… on duty today ? ( be )
3. Bell and Watson first ………… the telephone in 11876 ( introduce )
4. I don’t know where the Sao Mai theater ………….. ( be )
5. It is not safe ………… medicine around the house ( leave )
6. Water ……… at 100 C ( boil )
7 . It’s better for us ………. water ( save )
8. She …………… hard but she can’t open the box ( try )
9. He started ………… with ways of transmitting speech over a long distance ( experiment )

1. The test seems ...to be…... difficult.
2. Do you have …to be.…….. on duty today?
3. Bell and Watson first ……introduced…… the telephone in 1876
4. I don’t know where the Sao Mai theatre…...is……..
5. It is not safe ...to leave……… medicine around the house
6. Water ...boils…… at 100 C
7 . It’s better for us ....to save.….. water
8. She ..tries…………. hard but she can’t open the box
9. He started …to experience…….. with ways of transmitting speech over a long distance
Chúc bạn học tốt
Xin hay nhất
1 to be
2 to be
3 introduced
4 is
5 to leave
6 boils
7 to save
8 tries
9 to experince
cho mik xin ctrl hay nhất cho club đi ạ.Thanks