21．The girl in the photo wears a broad smile,her wavy hair _

21．The girl in the photo wears a broad smile,her wavy hair _______ over her shoulders．
A）flows
B）flow
C）flowing
D）flowed
24．John's outstanding performance in the competition proved that he was a _______ winner．
A）worthwhile
B）worthy
C）worth
D）worthless
26．The decision _______ ,the next problem was how to make a good plan．
A）has been made
B）were made
C）having been made
D）making
27．Paul was so _______ about his baldness that he wore a hat,whether it was winter or summer．
A）self-composed
B）self-conscious
C）self-confessed
D）self-confident
28．Sarah put in a special _______ for an extra day's holiday so that she could attend her friend's wedding．
A）inquiry
B）appeal
C）proposal
D）request
29．Mary has just bought herself _______ dress．
A）an expensive blue cotton
B）a cotton blue expensive
C）a blue expensive cotton
D）a cotton expensive blue
39．You said the books were on the shelf,but _______ there．
A）there was no one
B）there were none
C）there were no ones
D）was none
40．Human facial expressions differ from those of animals in the degree to which they can be _______ controlled and modified．
A）deliberately
B）noticeably
C）delicately
D）instinctively