[ Relative Clauses ]
Turning 21 is the time _______ people should think about their future.
A. which
B. who / that
C. when

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Grammar › ViewI wrote to my friend last week. She hasn’t answered my letter yet. I …………………………………. (wait, still) for a reply.
A. wait still
B. still wait
C. am still waiting
D. are still waiting
Prepositional Phrases › View
What is the object of the preposition in this sentence?
She couldn’t believe what she saw down the street.
A. saw
B. down
C. the
D. street