18. ______changed，and whatever men can do，woltllen call do，too
A Age had B Ages have C．Times have D Time has
No matter how long is your life, you will, at best, be able to read only a few books of all that have been written, and _____ few you do read should include _____ best.
| A．a; the | B．the; the | C．the; a | D．/; the |
Zhang Yimou is considered to be one of top directors in film industry．
| A．a；a | B．the；the | C．the；a | D．a；the |
Now I’ve been out of _____ work for weeks, I’ve joined the ranks of _____ unemployed.
| A．the; 不填 | B．the; the | C．不填; the | D．不填; an |
_____ concern about food safety seems to be ______ subject that is being discussed all over the world.
| A．The; a | B．A; ／ | C．The; the | D．／; the |
______ two pandas from Chinese mainland has become ______ hot topic in Taiwan.
| A．The, a | B．A, a | C．/, the | D．The, / |