21. Mr. Brown, chairman of the trade union, will visit our factory in ____ month of May.
A. a B. an C. / D. the
22. Smoking is not in the reading room.
A. agreed B. permitted C. promised D. admitted
23. It is _________ that we’d like to have a picnic.
A. such nice weather B. so nice a weather
C. such a nice weather D. too nice weather
