Topics: Past Tenses
In what year did Xiaomi _______ the first smartphone?
A. release
B. released
C. releasing
D. releases
Select your answer:
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Tenses › ViewA bomb scare ——————– a delay of the flight.
a) Caused
b) Cause
c) Was caused
d) Had caused
Vocabulary › View
Determine information about something
A. assess
B. complex
C. researchers
D. welfare