Earlythisyear,CaptainStartupwasflyinganaeroplaneoverNewZealand.

Therewasatelevisioncameracrewonboard.Suddenly,outinthenightsky,a

brightspherecameintoview.Everyoneonboardsawitandeveryonethought,

"UFO"--UnidentifiedFlyingObject.ManypeoplebelievethataUFO

isavisitingcraftfromouterspace.Thecameracrewwentintoactionand

startedfilming.Thatweekpeopleallovertheworldsawthefilmofthis

mysteriouslightontheirtelevisionscreens.Someonedescribedtheobjectas

"ashiningpingpongball".Whatwasit?Wasitaspaceshipfullof

visitorsfromanotherplanet?TheCaptainandthefilmcrewbelieveditwas.

Otherobservershadmanydifferentexplanations.SomesayitwasVenus.Some

sayitwasjustatrickoflight.Thepeopleontheaeroplanewerenottheonly

oneswhosawthe"UFO".Anairtrafficcontrolleralsosawitonhis

radarscreen.WhenareporteraskedhimifhebelievedinUFO,hesaid,"I

don'tknowwhattheyare,butI'vegotanopenmindonthem."Likemany

scientists,hethoughtthataflockofbirdscauseddotsonhisradarscreen

whentheUFOappeared.

Mostastronomersnowbelievethatwhat

thesepeoplesawwasalmostcertainlytheplanetVenus.Atthattimeofyearit

isverybrightandeasytosee.Andfromamovingaeroplaneitcanappeartobe

movingfast.SofarthereisnoproofthatUFOsorspaceshipsfromother

planetsdoexist.

16.TheUFOthepeopleonboardtheplane

sawis_________.A.alongobjectB.a

squareobjectC.aroundobjectD.

ashortobject17.WhichofthefollowingstatementsisNOT

true?A.ThecaptainbelievedthattheUFOwas

visitingcraftfromouterspace.B.ThecameracrewbelievedthattheUFO

wasvisitingcraftfromouterspace.C.Theairtrafficcontrollerbelievedthat

theUFOwasvisitingcraftfromouterspace.D.ManypeoplebelievedthattheUFOwas

visitingcraftfromouterspace.18.Whichofthefollowingpossibilitiesis

NOTmentioned?A.TheUFOwasfromouterspace.B.TheUFOwasanotherplane.C.TheUFOwasanunusu