Since the time humankind started gardening, we _____to make our environment more beautiful.

Tom ______ with his grandmother for eight years，but now he is living by himself.

- I hear that Jason is planning to buy a car. -I know. By next month, he _     enough for a used one.

 ________ we ________ much longer, we might not even have had the spot on the rooftop.

Teachers’ words and deeds ______ a great effect _____ their students.