根据句意,写出括号内所给单词的适当形式。 小题1:We love our children and our parents love ______(they). 小题2:If giant pandas are in ______(dangerous), they will attack people. 小题3:______(luck), he was not badly hurt in the car accident last month. 小题4:Thousands of ______ (tour) come to the Great Wall every year. 小题5:The places ______(mark) in red are very dangerous.