Millie's research paper isn't up to standard_________ she has worked at it for two weeks．（ ）
A．sinceB．unlessC．ifD．although
Be quick， we'll fail to catch the school bus．
Don't worry． It's only seven o'clock now． We still have enough time．（ ）
A．andB．butC．orD．so
Listen! It's raining outside．
Wow， look! The yard is full of rainwater now!（ ）
A．stronglyB．hardlyC．greatlyD．heavily
Excuse me， sir． Are you sure the umbrella in your hand belongs to you？
Oh， sorry． I took it ． Mine is over there under the chair．（ ）
A．at onceB．on timeC．by mistakeD．in all
Mom． can I leave the chores till tomorrow？
I'm afraid not． You can't today's work till tomorrow．（ ）
A．put offB．turn downC．give awayD．look up
Great changes have taken place in Xiangyang． We are all the achievements．（ ）
A．known asB．proud ofC．similar toD．good with