The clerks were at work so ______ that nobody realized it was already lunch time．
| A．accurately | B．absently | C．aggressively | D．attentively |
English is a language shared by several diverse cultures，each of——uses it somewhat differently.
| A．which | B．what | C．them | D．those |
This is the desk, ______desk is broken.
| A．whose | B．of which | C．which | D．that |
This summer North China was attacked by such a terrible heat few people has ever experienced before.
| A．that | B．and it was | C．which | D．as |
One Friday,we were packing to leave for a weekend away my daughter heard cries for help
| A．after | B．while | C．since | D．when |
regular exercise is very important.It’s never a good idea to exercise too close to bedmme.
| A．If | B．As | C．Although | D．Unless |