When Captain Bligh arrived in Tahiti, it became clear that it would be some months ______ the breadfruit trees were ripe and ready to be taken to the West Indies.

 A. that                        B. before           C. since         D. then

（2010·吉林长春外国语学校高三上第一次月考）   7．When Captain Bligh arrived in Tahiti, it became clear that it would be some months ______ the breadfruit trees were ripe and ready to be taken to the West Indies.

 A. that              B. before             C. since         D. then