I grew up in Africa, at least I should say that I spent much of the first ten years of my life there.
The Great Wall travel _______deep valleys, ________deserts and ________mountains.
The two boys fought and fought until one_____________. A. gave up B. gave in C. gave away D gave off
What an important role the Internet _____ in our life! One can hardly imagine ____ life would be like without it.
He looked at the envelope(信封) and _____ Jenny’s handwriting immediately.
American English has changed _______ the centuries. There are several reasons _____ this.