---____do your parents think ____the pet dog?---They think it’s cute.A.What,of B.How,of C.What,about
_____ he tried his best, he failed at last.
Mark is telling his parents _____ he saw on the way home just now.
She has some trouble _____ out the math problem.
You have to adapt_____ the new environment when you go to a new place.
I want to know _____.