[ Conjunctions ]
Choose the word or phrase that best completes the sentence.
Halley’s Comet had its first documented sighting in 240 B.C. in China and _____ it has been seen from the Earth 29 times.
A. after
B. because of
C. since then
D. that is
Select your answer:
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______ I borrow your book please?
A. Should
B. Must
C. May