题目

26. His younger sister is often made to cry by him, but this time she made him ______. A. crying                      B. cry                          C. to cry                       D. cries 答案：B蓝藻能进行光合作用是因为其体内含有A.叶绿体B.叶绿素C.叶绿素和藻蓝素D.菌绿素