two lmportant keys

Question

Taking regular exercise and eating a balanced diet are two important keys ________ good health. A．in B．from C．of D．to

Answer 1

D D 考察介词。句义：定期做运动和保持均衡的饮食是保持身体健康的两个关键点。Key意为关键，钥匙；后面接介词to，故答案为D。