—If you go hiking in the summer vacation, ______ me a ring. —I will.
We had a really bad time about six months ago but now things are _____.
— What's the matter with you, Lucy? — After the long walk, my legs _____ and I couldn't go any farther.
The task _____ more difficult than we expect.
_____ his happy look, he must have passed the driving test.
_____ to too much sunlight, as is generally considered, will add to the potential of catching skin cancer.