Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts.
| A．frequent | B．usual | C．ordinary | D．common |
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 |
28. Do you happen to know the proverb, “Shoot two ____ with one arrow”?
| A．birds | B．hawks | C．dogs | D．Wolves |