[ Grammar ]
Open the window, and let the fresh air fill the room.
A. simple
B. compound
C. complex
D. compound-complex

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Perfect Verb Tenses › ViewIdentify the perfect tense in the following sentence: “We have known each other for ten years.”
A. Present Perfect
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His friends offer to ______ the next time he was in town so that he wouldn’t have to pay for a hotel.
A. place him in
B. put him up
C. back him up
D. turn him out
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A. did I see
B. saw I
C. have I seen
D. I have seen
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___ more carefully, he would not have had the accident yesterday.
A. If Peter drove
B. Had Peter driven
C. Only if Peter could drive
D. Unless Peter had driven
