[A] acting

　　[B] relying

　　[C] centering

　　[D] cementing

　　22.

　　[A] before

　　[B] unless

　　[C] until

　　[D] because

　　23.

　　[A] interactions

　　[B] assimilation

　　[C] cooperation

　　[D] consultation

　　24.

　　[A] return

　　[B] reply

　　[C] reference

　　[D] response

　　25.

　　[A] or

　　[B] but rather

　　[C] but

　　[D] or else

　　26.

　　[A] considering

　　[B] ignoring

　　[C] highlighting

　　[D] discarding

　　27.

　　[A] on

　　[B] in

　　[C] for

　　[D] with

　　28.

　　[A] immune

　　[B] resistant

　　[C] sensitive

　　[D] subject

　　29.

　　[A] affect

　　[B] reduce

　　[C] chock

　　[D] reflect

　　30.

　　[A] point

　　[B] lead

　　[C] come

　　[D] amount

　　31.

　　[A] in general

　　[B] on average

　　[C] by contrast

　　[D] at length

　　32.

　　[A] case

　　[B] short

　　[C] turn

　　[D] essence

　　33.

　　[A] survived

　　[B] noticed

　　[C] undertaken

　　[D] experienced

　　34.

　　[A] contrarily

　　[B] consequently

　　[C] similarly

　　[D] simultaneously

　　35.

　　[A] than

　　[B] that

　　[C] which

　　[D] as

　　36.

　　[A] system

　　[B] structure

　　[C] concept

　　[D] heritage

　　37.

　　[A] assessable

　　[B] identifiable

　　[C] negligible

　　[D] incredible

　　38.

　　[A] expense

　　[B] restriction

　　[C] allocation

　　[D] availability

　　39.

　　[A] incidence

　　[B] awareness

　　[C] exposure

　　[D] popularity

　　40.

　　[A] provided

　　[B] since

　　[C] although

　　[D] supposing