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【单选题】
高血压分原发性和继发性两大类,占高血压90%-95%的是A.
原发性高血压
B.
继发性高血压
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举一反三
【单选题】We regret having received your offer too late, BECause we ____ our needs elsewhere.
A.
already cover
B.
already covered
C.
have already cover
D.
had already covered
【单选题】We regret to ________ you that our library will be closed next Wednesday, Thursday and Friday for the sports meeting. [ ]
A.
say
B.
speak
C.
inform
D.
notice
【单选题】If we ________ now to protect our mother river ---Li Jiang River , we ‘ll live to regret it.
A.
haven’t acted
B.
won’t act
C.
don’t act
D.
hadn’t acted
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