[单选] What we have to take________the courses offered only for this term．

题目：[单选] What we have to take________the courses offered only for this term．
A . are
B . is
C . have been
D . has been

正确答案：A
解析：
What引导的主语从句根据其宾语的含义确定谓语的单复数。例：What we want are books／is water．Courses是复数，排除选项B和D。这学期要做的事应用一般现在时。选项A是正确的。【句子大意】我们必须要选的课是只在这学期开的。