--- Where ___________ your pen pals from? --- The United States.
I found_________hard __________ the work in such a short time.
— Can we visit Hong Kong this summer holiday?— I wonder _______ it is the best time to go there.
— Look at the photo I took in Jinghong, Yunnan Province. _______ the Dai people were having!— Wow! They were celebrating the Water Festival.
You should learn to think while reading. Usually, behind the lines _______ the writer’s true meaning.
After working her way around the world, Annie ended up _______ English as a foreign language.