Ⅰ、Choose the best answer.(选择最恰当的答案，用A、B、C或D表示填入括号内) （共20分）
( ) 1. What's that on the floor? It's just ______ small orange.
A. a B. an C. the D. /
( ) 2. Three _______ the excellent students in our university will first graduate from school.
A. hundred B. hundreds of C. hundred of D. hundreds
( ) 3. It was very cold the day before yesterday and it rained the whole day. __________ .
A. So it was B. It was so C. So did it D. So it is
