A professor said the rise of the BRICS countries(金砖国家) is a/an _______ of the end of the world in the control of the USA.A. barrier B. process C. aspect D. symptom
I dreamed _______ my mother last night.
Are you afraid ______ dogs?
My English teacher is nice. She is like my mother _______ me.
—Have a good day at school!—_________.
It takes us two hours _______ the piano every day.