Some teenagers _______ their health because they often expose themselves to so many electric products.
| A．have damaged | B．are damaging | C．damaged | D．will damage |
23. Every Monday morning, all the teachers and students in our school stand at ____ as our national flag is raised.
| A．attention | B．attentions | C．at ease | D．Attentively |
24. --- What are the greatest ____ ?
--- A giant panda.
attraction B. attractions C. attractive D. Attract
25. Australia is an island continent lying between ____ .
| A．the Pacific Ocean and the Atlantic | B．the Indian Ocean and the Atlantic Ocean |
| C．the Arctic Ocean and the Pacific Ocean | D．the Pacific Ocean and the Indian Ocean |
26. The leaves of this tree turn red ____ , so we visit it at the end of every October.
| A．in the autumn | B．in autumn | C．in early autumn | D．in late autumn |
27. He is above ______ in his lessons. That's the results of his hard work.
| A．average | B．all | C．anyone | D．Everyone |