Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
Our school started building a new canteen in June. They are still building it now.
A. Our school have started building a new canteen from June till now.
B. Our school have been building a new canteen since June.
C. Our school have built a new canteen now since starting in June.
D. Our school are building the new canteen which started in June.
Đáp án B