[ Present Perfect Simple & Continuous ]
What’s the most valuable thing you ______ so far?
A. have purchased
B. purchasing
C. have been purchasing
D. purchase

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Active & PassiveSubordinating ConjunctionTypes of SentencesModals and Active and Passive VoicePresent Simple and Modal VerbsKinds of NounsJobsInfinitives or GerundsSimple Past1st and 2nd ConditionalsOther quiz:
Pronouns and Antecedents › ViewEach of my sisters has ____ own room.
A. their
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Phrasal Verb › View
bring a new car engine into full use (by driving it slowly for a set period)
A. run out of
B. run in
C. run through
D. run off