By 2020 I think we will ____________ a settlement on Mars
B. Have built
C. Have been building
D. Be built
Passive Voice AntonymsLend vs. Borrow Grammar Double Object VerbsActive and Passive voicePresent ContinuousPresent Perfect - Just, Already, YetRelative & Interrogative PronounsPast Tense
Other quiz: Question Words
Amirul is the boy ________ father is a pilot.
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