原题:
题型:单项选择-四个选项
—Why can’t Mary see the blackboard?
—Because a boy sits ________ her, and he is very tall.
—Because a boy sits ________ her, and he is very tall.
| A.behind | B.next to | C.across from | D.in front of |
题目考点:介词用法,位置关系表达
