I am really worried about his grades in the coming test because of the little use he ______ of his spare time before it.
This is a complex operation. A team of nurses _____ the doctor in performing the operation.
The conflict between economic development and environmental protection, if not appropriately _________, can cause disastrous consequences in daily life settings.
People are always coming in here borrowing my hammer, you know, to fix a cart wheel or ______.
The WHO ________ eat less bacon and other preserved meat because they can cause cancer.
The coat ________ thin but ________.