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 )
Loga
Sinh Học lớp 12
