The new buyer identified a dozen new sources for the material, ___________ proved to be reliable．
A. most of them B. most of which C. most of whom D. most of those
_____ I say Clancy is a smart boy, he still needs to work hard to achieve his goal.
A. Then B. When C. While D. As
Unfortunately, ____ stone hit him on ______ head and he got injured.
A. the; a B. a; 不填 C. a; the D. the; the
____ to Anne's birthday party, Mr. Brown is now searching shop after shop for a nice present for her.
A. Having invited B. Having been invited C. Have been invited D. Being invited
The activities organized by our school really gave us a platform ____ we learned team spirit.
A. that B. where C. which D. when
请你代表你班同学给校长写一封信，反映一下你校食堂的几点问题，以引起学校重视，并针对问题提出2条合理建议。
菜价昂贵，菜式单一
排队时间长，浪费午休时间
味道不佳，浪费现象严重
提示词：食堂 canteen
Dear Principal,
Recently, many students are discussing the problems of the canteen.
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I sincerely hope you can adopt my suggestions. Thank you!
Yours,
Li Hua
