— I can’t find my dictionary anywhere.— You _____ have lost it while studying in the library.
She remains optimistic (乐观的) in spite of so much hardship she has _______ .
I was just _______to go out when the telephone rang .
Doing morning exercises _______ our health and we _______ it.
I won’t have anything like that _______ in my class .
I love to buy a new dress at a _______ at the Spring Festival.