Directions: Thereare30 incompletesentencesinthispart. ForeachsentencetherearefourchoicesmarkedA), B), C) andD). ChoosetheONEthatbestcompletesthesentence. ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.

21. Aftertherobbery, theshopinstalledasophisticatealarmsystemasaninsurance________ furtherlosses.
A) for
B) from
C) against
D) towards（C）


A) Havingbelieved
B) Believing
C) Believed
D) Beingbelieved（B）

23. Ahealthylifeisfrequentlythoughttobe________ withtheopencountrysideandhomegrownfood.
A) tied
B) bound
C) involved
D) associated（D）

A) hasleft
B) istoleave
C) leaves
D) istobeleft（D）

25. Beforethefirstnon-stopflightmadein1949, it________ necessaryforallplanestolandforrefueling.
A) wouldbe
B) hasbeen
C) hadbeen
D) wouldhavebeen（C）


A) buildup
B) standfor
C) makeup
D) conformto（C）

27. ________ mightbeexpected, theresponsetothequestionwasverymixed.
A) As
B) That
C) It
D) What（A）


A) tocorrect
B) correcting
C) havingcorrected
D) beingcorrected（D）

29. Featuressuchasheight, weight, andskincolor________ fromindividualtoindividualandfromfacetoface.
A) change
B) vary
C) alter
D) convert（B）

30. Imakenotesinthebackofmydiary________ thingtobemendedorreplaced.
A) by
B) in
C) with
D) of（D）