Look , your parents_______ you at the bus stop.

The weather in Beijing is ______ than ______ in Nanjing.

We will never forget those happiest days _______ we spent on the summer camp.

When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

CoCo LeewasborninHong KongbutinAmerica.