He works in China now, But he ______in Africa for eight years

To avoid ________ the same mistake, what should I do—You’re supposed to copy the mistake twenty times.

Great changeshave taken place in Putian City .I can hardly recognize it . —-Youare right .It is no longer ______ it used to be ten years ago .

lish class, our teacher often creates anenvironment _____ we are given the opportunity to solve problems ourselves.

Look at the trouble I am in! If only I your advice!