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【多选题】
下列蔬菜中属于藻类蔬菜的是 。A.
B.
紫菜
C.
海带
D.
石花菜
E.
琼脂
F.
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【简答题】In America, when the eighth graders leave the middle school, they are often worried about moving to the high school. It is a hard time for them, but it can be an exciting one as well. To make it easie...
【单选题】Pilots often look older than they really are because______.
A.
they eat dinner in the middle of the night
B.
they suffer a lot from the changes in time
C.
they have to work at the weekend
D.
they live far away from the airport
【单选题】-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.
A.
volunteers; volunteers
B.
volunteer; volunteers
C.
volunteers; volunteer
D.
volunteer; volunteer
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