When the winter _____ , all the construction works in northern China have to be stopped .
| A．sets off | B．sets out | C．sets aside | D．sets in |
In order to understand the____ of the animal, she spent many years recording its daily activities.
| A．performance | B．deed | C．behavior | D．personality |
Only after the woman had her own child ___ how difficult it was to be a mother.
| A．she realized | B．had she realized | C．she had realized | D．did she realize |
I would appreciate ________ much if you could write to me as soon as possible.
| A．that | B．it | C．this | D．what |
Why not get some work experience first ______ go straight on to university?
| A．other than | B．rather than | C．more than | D．less than |
Word came ______ our duties would be changed.
| A．that | B．which | C．whether | D．when |