一、单项填空 在A、B、C、D四个选项中, 选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。(本大题共15分，每小题1分)
1. — Have you seen ________ pen? I left it here a moment ago.
— Is it ________ yellow one? I think I saw it somewhere.
A. a; a B. the; the C. the; a D. a; the
2 Call us at _______ you need _______ 4008-823-823. KFC is ready for you!
A. any times; for B. any time; for C. some time; on D. any time; on
3 ________ teachers are going on an outing during the May Day holiday. ________ the teachers is about 50.
A. A number of; A number of B. A number of; The number of
C. The number of; The number of D. The number of; A number of
