I don’t think it wise ________ the hard work that they have refused to do.
.Look! The dictionary, ________cover is red, is a birthday gift given by Tom.
_______environmental damage is done, it takes many years for the ecosystem to recover.
.Every possible means _______to prevent the air pollution, but the sky is still not clear.
.______ surprised the family most was ________the girl played basketball very well.
.I have to see the doctor because I________a lot lately.