Which of the d_____do you think is more serious between the

Which of the d_____do you think is more serious between the which book do you think is （ ） of the two Do you think the problem of climate change is serious?What s What do you think is the most serious challenge of living in what do you think is the most serious chanllenge of living i Which do you think is more important in the information age, which do you think is more important,your mother or the test 问一个英语语法题目do you think which season is the best season of the How do you think of the relationship between competition and When I think of you,the miles between us love of the two types of music,which do you think is the　problem 　of　food　asfety　is　getting　more　and　more　serious