Dog barking is no unpleasant noise but an auspice(吉祥)of fortune in ______ears of Chinese，especially in the coming Year of _______Dog in the Chinese lunar calendar，which starts on Jan.29 this year and ends on Feb.17 next year.
| A．a; a | B．不填； | C．不填；the | D．the；the |
The factory produces half a million pairs of shoes every year, _________ are sold abroad.
| A．80% of them | B．80% of that | C．80% of the shoes | D．80% of which |
China isn't the country _________ she used to be 50 years ago.
| A．that | B．which | C．what | D．since |
Do you have anything is important to tell me?
| A．which | B．that | C．/ | D．it |
20 . They have made_______a rule________in the room.
| A． this; not to smoke | B． it; smoking |
| C． it; to not smoke | D． it; not to smoke |
19. I wondered_____that made him so upset.
| A． how it was | B． which did it | C． what it was | D． who did it |