— There are 28 or 29 days. Which month is it?
— _____.[ ]
A. January
B. February
C. May
答案:B
如图所示的是甲、乙两物体的v-t图象,由图可知
A.甲做匀加速运动,乙做匀减速运动
B.甲、乙两物体相向运动
C.乙比甲晚1 s开始运动
D.5 s末两物体相遇
John agreed to the suggestion that his students _____ two weeks to prepare for the exam.
A.give
B.should give
C.be given
D.must be given