A.the sipmlest solution

　　B.the solution of simplest

　　C.the solution that simplification

　　D.which solution simplest

　　2)The poet MM spent several years ___ school in CP.

　　A.had taught

　　B.teaching

　　C.her teaching

　　D. and to teach

　　3)When the US C authorized a postal service in 1789,  ___ 75 local offices.

　　A.the nation having

　　B.has the nation

　　C.the nation had

　　D.for the nation to have

　　4)___ places on the Earth where plant and animal life has not been affected by the activities of humans.

　　A.The few

　　B.Being few

　　C.There are fewb

　　D.Few

　　5)___ nerve pathways conect the eye directly to the pineal gland, that gland is extremely sensitive to light.

　　A.Because

　　B.That

　　C.How

　　D.By

　　6)Chrom……s vary in size and shape and usually ___ in pairs.

　　A.occurring

　　B.to occur

　　C.occur

　　D.as occur

　　7)SL became the first VS woman ___ abroad the RM space station. A.who working

　　B.has worked

　　C.was working

　　D.to work

　　8)The gravitational  attractive of a black hole is extremely intense, but it would be no stronger ___ of a normal star of the same mass.

　　A.than that

　　B.as is

　　C.than it is

　　D.from which

　　9)____ basically hunting animals and as such are physiologically adapted to going for long periods without food or water.

　　A.Dogs being

　　B.Dogs

　　C.There are dogs

　　D.Dogs are

　　10)In filmmaking, ___ the segments of a film are presented can be varied to creat drastically different dramatic effects.

　　A.the order which in

　　B.the order in which

　　C.in the order which

　　D.in which the order

　　11)Perhaps even more important than the accuracy and realibility of a m……cal instrument ___.

　　A.that positioning it is correct

　　B.is positioned correctly

　　C.that its correct position

　　D.is that it be positioned correctly