[ Phrasal Verb ]
investigate
A. look in on sb
B. look into
C. look on
D. look out

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Present and Past TensePresent Continous TensePast Tense vs Future TenseConditional SentenceProgessive TensesSo Such Enough TooModal Verbs and ConditionalsBare Infinitive and To InfinitiveExpressing Obligation and ModalsVerb Present Simple TenseOther quiz:
Grammar › ViewYou need to work really ________ if you want to be a success.
A. hard
B. hardly
C. hardfully
Grammar › View
___ is cheaper, the fish or the chicken?
a. What
b. Which
c. How
He ____ to the gym every day.
A. goes
B. went
C. has gone
Grammar : Must (Necessity) › View
You ___ touch that! You might burn yourself!
A. must
B. must’nt
C. don’t have to
