Topics: Present Perfect Tense
Which one is correct ?
A. go/went/been
B. Do/does/did
C. Have/Had/Had
D. Is/am/are
Select your answer:
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Grammar › ViewWhich sentence is in the passive voice?
A. The trial was conducted by the researchers.
B. The researchers conduct the trial.
C. The researchers will conduct the trial.
D. The researchers conducted the trial.
Modal Verbs › View
They ___ not enter the restricted area without permission.
A. might
B. must not
C. can
D. should