—Sure, I will.
A:taking care of
B:to take care of
C:looking after
D:to look for
It is important to wear suitable clothes on different ____(occasion).
某中学有一个150m×70m大小的操场,广播室在操场两端架起两个音箱S1和S2(如图),老师绕场一周试听了一番,在甲、乙、丙、丁四处(它们分别是各边的中点),觉得有两处声音含混不清,则这两处是( )
北回归线自东向西穿过的我国四个省(区)是( )