The new machine is supposed to be the solution to all our production problems, but"____".

_________ that it’s very cruel to kill wild animals for money.

_______ on your study, and you will make greater progress．

Attractive ________ the device might seem, “my wife has already done that by herself” was a common response after people seeing it when it was introduced on show this week. 

Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors．