We decided not to climb the mountain because it was raining ___.
— How can I wake up so early? — Set the alarm at 5 o’clock, you’ll make it.
Mr. Smith didn’t understand _____ made his son so upset that evening.
Although cats can not see in complete darkness, their eyes are much more ______ to light than human eyes.
Don’t mention that at the beginning of the story, or it may _______ the shocking ending.
I’m tired out.I stayed up the whole night, ______ for my midterm math exam.