My aunt arrived ______ Guangzhou ______ the morning of March 13.

What do you think of the weather in Nanjing—-It’s warmer than________ in Beijing.

My parents tell me not to eat food that stays out overnight, _______it tastes ____. .

Children who are not active or _____ diet is high in fat will gain weight quickly.

_____ the steep mountains，he had no difficulty reaching the top.