根据句意,写出括号内所给单词的适当形式。 ____ We love our children and our parents love ______(they). ____ If giant pandas are in ______(dangerous), they will attack people. ____ ______(luck), he was not badly hurt in the car accident last month. ____ Thousands of ______ (tour) come to the Great Wall every year. ____ The places ______(mark) in red are very dangerous.