I can’t understand what the book is about because it _______ in English.

．—I’ll return the book to Mary，but I can’t find her anywhere．—She ________ the teacher’s office．You can find her there

Those who continuously acquire new knowledge that they can ________ their work are more likely to succeed.[ ]

It is often recommended that children _______ chances to get close to nature.

If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.