高中英语:unit 2 cloning learn about vocabulary课件 人教版选修8 (共17张ppt)
高中英语:unit 2 cloning  learn about vocabulary课件 人教版选修8 (共17张ppt)第4页

Use the above words to fill the following blanks: 1) When did the explosion _______ ? 2) Important elections _______ this fall? 3) The concert will ___________ next Sunday. 4) How did the quarrel ___________ ?

occur

take place

come about

happen