We spent many years studying the formation of rocks , experiencing many sufferings and even death. But our hard work in the end , and we made it.
It was my sister ________ first had the idea to cycle along the entire Mekong River.
I’m surprised to hear from my school teacher again. ________, it is ten years since we met last.
My classmates insisted that I ________ the school field trip to Jilin.
—Miss Wang, I hear that you ________ for Beijing. Have you got everything ready? —Almost.
American English has changed ________ time. There are several reasons ________ this.