19. My grandpa has many hobbies which _________ from collecting stamps to planting flowers.
—The bedroom is too dirty.______ we clean it? —Of course.
We can’t ______ the car.There ______ something wrong with the engine.
Jane told me she would not attend the conference ______.
Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.
They said that they ______ a wonderful time in Beijing and they hoped to be there again.