This special school has had more than 1,000 students ___ 1990.A.for B.since C.in D.during

题目

This special school has had more than 1,000 students ___ 1990.A.for B.since C.in D.during

答案

B has had 完成时态,用since. 如果是for, for 后面应该跟连续的时间..比如for three years. In 应该是过去时态.