Thanks very much __ me to dinner.[ ]
A. to ask
B. for ask
C. to asking
D. for asking
答案:D
Most probably it will be another 7 hours _____ you can have next meal, so each of you must have
your stomach full.[ ]
A. since
B. when
C. after
D. before
液压传动系统基本上由哪几个部分组成?