[ Grammar ]
It is high time we ____ action against climate change.
A. take
B. took
C. have taken
D. will take

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TOEFL › ViewLapis Lazuli, ________ stone, hs been valued for ornamental purposes for more than 6000 years.
A. an opaque deep blue
B. is an opaque deep blue
C. it is an opaque deep blue
D. that is an opaque deep blue
Tenses › View
This tense is used for Habits and Routines.
A. Simple Past
B. Present Continuous
C. Simple Present
D. Present Perfect