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【多選題】
下列軟件中，屬于計算機操作系統的軟件有 （ ）
A.
Excel
B.
DOS
C.
windos98
D.
WORD
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舉報參考答案：
舉一反三
【單選題】John received an invitation to dinner, and with this work ____ , he gladly accepted it .
A.
finished
B.
finishing
C.
having finished
D.
was finished
【單選題】What do we learn about Mary?
A.
She is on vacation.
B.
She travels around the world
C.
She collects postcards
【單選題】I had just stepped out of the bathroom and was busy drying myself with a towel ____ I heard the steps.
A.
while
B.
when
C.
since
D.
after
相關題目：
【單選題】John received an invitation to dinner, and with this work ____ , he gladly accepted it .
A.
finished
B.
finishing
C.
having finished
D.
was finished
【單選題】What do we learn about Mary?
A.
She is on vacation.
B.
She travels around the world
C.
She collects postcards
【單選題】I had just stepped out of the bathroom and was busy drying myself with a towel ____ I heard the steps.
A.
while
B.
when
C.
since
D.
after
參考解析：
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