The pilot asked all the passengers on board to remain ________ as the plane was

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The pilot asked all the passengers on board to remain ________ as the plane was making a landing. [      ]
A. seat
B. seating
C. seated
D. to be seating

答案

举一反三

________ with so many fans of the famous star, the stadium is hard for  us to enter.[      ]
A. Crowding
B. To be crowded
C. Crowded
D. Crowded out

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短文改错
     Growing up is not easy.Sometimes all that is need is someone to rely on.
    For many years, she was Mum.My mother was a career woman and has her
own problems to take care, but when I needed her, she was always there.Her
strength came from anywhere.I don"t quite know, somewhere very deep.She was
so strong that she would never break down, even while I went to her with all my
littleboy problems and shout at her.
    Her strength made me stronger and gave to me courage to try things other
thought were impossible.A helping hand is always stronger enough to lift you up.
_____________________________________________________________

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________ from endless homework on weekends, the students now find their own activities, such
as taking a ride together to watch the sunrise.[      ]
A. Freed
B. Freeing
C. To free
D. Having freed

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________ in her most beautiful skirt, the girl tried to make herself ________ at the party.[      ]
A. Dressed; noticed
B. Dressing; noticed
C. Dressed; noticing
D. Dressing; being noticing

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— Why didn"t you attend the party ________ in the hall the other day?
— I just wanted some quiet time by myself.[ ]
A. held
B. being held
C. to be held
D. holding

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