1.Helpingothersisahabit,__________youcanlearnevenatanearlyage.A.itB.thatC.whatD.one2.Thecountryhasalreadysentupthreeunmannedspacecraft,themostrecent______attheendoflastMarch.A.hasbeenlaunchedB.havingbeenlaunchedC.bingl
1.Helpingothersisahabit,__________youcanlearnevenatanearlyage.
A.it
B.that
C.what
D.one
2.Thecountryhasalreadysentupthreeunmannedspacecraft,themostrecent______attheendoflastMarch.
A.hasbeenlaunched
B.havingbeenlaunched
C.binglaunched
D.tobelaunched
3.--I'msorryIbrokethevase
--Oh,_______.Itwasn'tveryexpensive.
A.you'dbetternot
B.I'mafraidnot
C.asyouwish
D.that'sallright
4.Knowingofficerules--whether_______ornot--iscritical,especiallyforyoungjobseekers.
A.written
B.writing
C.beingwritten
D.havingbeenwritte,
5.______totoomuchsunlight,asisgenerallyconsidered,willaddtothepotentialofcatchingskincancer.
A.Beingexposed
B.Exposed
C.Exposing
D.Toexpose