If a business wants to sell its products (international) ______ , it should do some world market research first.
第1题
A.Now that
B.Even though
C.Every time
D.Only if
第2题
A.by
B.on
C.with
D.at
第3题
A.Not know
B.Not known
C.Not to know
D.Not knowing
第4题
A.to sign
B.signed
C.to be signed
D.signing
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