The Super Girl Wang Bei’s death highlights the fact ________ cosmetic surgery has become one of China’s biggest beauty secrets.

I cannot______ puzzled，for I simply cannot understand how I could have made such a stupid mistake

The government should develop systemto predict when wildfires occur andgivewarnings in time

Listen! Marry is singing in the next room. — It __ ___ be Marry. She has gone home.

By the time I got back to school, the bell______.