Mother__ the baby gently on the bed and then bent down to pick up the toy___on the ground.
People who do not smoke have less ______of suffering from lung cancer than those who do so.
This factory produced much dirty water, which resulted in a wide______of environmental problems.
Please tell me how the accident _______.I am still in the dark.
It is______ of him to set his aim high but do little, so he is always leaving things undone.
— Do you think it's a good idea to make friends with your students? —________, I do.I think it's a great idea.