WHEN I ... THE DOOR, SHE WAS READING A NEWSPAPER. WHEN I ... TH...

41. - 3500 CAU TRAC NGHIEM ON TAP AV THCS

3500 CAU TRAC NGHIEM ON TAP AV THCS

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41. When I ... the door, she was reading a newspaper.

a. opens

b. opened

c. was opening

d. was opened

 b