A person who has slept well will have a clear mind and work efficiently in the daytime ______ people with sleep disorders find it difficult to concentrate during the day.
| A．unless | B．while | C．if | D．until |
－I want a room for 20 people to have a birthday party．
一Unlucklly there is no one
| A．qualified | B．available | C．standard | D．permanent |
The teacher demands that she her test papers within ten minutes．
A．turn in B hands in C．have turned in D has handed in
As is kn
own to us a11，success usuallydiligence while lazines can
failure
| A．results from；lie in | B．resuits in：lead to |
| C．results in；lie in | D．resuhs from：lead to |
The ma
nagerexcited when he learnt the projectwell
A．sounded；was progressed B．was sounded；progressed
C sounded；was progressing D．was sounded；would progressed
Chemical processesin the treatment of materials for clothes the environment badly in some countries nowadays．
| A．involve；damaging | B．involved；damaged |
| C．involving；damage | D．involved；damage |