—Imagine you are outside when     earthquake comes. What should you do?
— Go to     open space away from buildings or trees.

—Imagine you are outside when     earthquake comes. What should you do?

— Go to     open space away from buildings or trees.

A．the; the           B．the; an            C．an; the           D．an; an

—Imagine you are outside when      earthquake comes. What should you do?

­ — Go to      open space away from buildings or tree.

A. the; the     B. the; an      C. an; the          D. an; an

---Imagine you are outside when     earthquake comes. What should you do?
?---Go to    open space away from buildings or tree

1. A.
   the; the
2. B.
   the; an
3. C.
   an; the
4. D.
   an; an

---Imagine you are outside when ______ earthquake comes. What should you do?

----Go to ______ open space away from buildings or trees.

A. the; the　　 B. the; an　　　 C. an; the　　　 D. an; an

—Imagine you are outside when            earthquake comes. What should you do?

­ — Go to            open space away from buildings or tree.

A. the; the             B. the; an              C. an; the                     D. an; an

 —Imagine you are outside when        earthquake comes. What should you do?

— Go to        open space away from buildings or trees.

A. the; the                  B. the; an                     C. an; the                            D. an; an

—Imagine you are outside when     earthquake comes. What should you do?
­ — Go to    open space away from buildings or tree.