机动车驾驶员培训机构应当建立学时预约制度，并向社会公布联系电话和预约方式。（）
参考答案：对
Li Ming’s best friend Wang Dong ___ behind me in our classroom. [ ]
A. were sitting
B. sits
C. are sitting
D. sit
何谓时间依赖性抗生素?
