[ Mixed General Quiz ]
Doctors may ask a patient to drink ___ to do a stomach and intestinal test.
a. valium
b. barium

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Present Simple ProgressivePresent Perfect or Past Simple TenseNouns, Articles, DeterminersAdverb of TimeSo or SuchComparison of Adjectives and AdverbsAdverb and Noun ClausesPhrasal VerbsPast Simple and Past ContinuousModal PerfectOther quiz:
Gerund and Infinitive › ViewTry ….. all questions that are obligatory.
A. answering
B. to answer
C. to answering
D. answer
Grammar › View
The scientist usually works in his lab __________ the sun sets.
A. until
B. as soon as
C. although