____foreigners come to visit this museum every year填several thousand of还是several thousand为什么 还有如果是five thousands 呢要不要加of

____foreigners come to visit this museum every year填several thousand of还是several thousand为什么 还有如果是five thousands 呢要不要加of I’m having trouble ____foreigners.A-understand B-understanding 我们学习英语是为了能更好的跟外国人沟通 英文We learn English to ___better ____foreigners because of entering the WTO,____foreigners have been in that country for business.A.some B.fewerC.all D.more come come come come come come come come come come come come come come