The____ofAIDShasledtoanexpansioninresearchseekingacure.
A、innovation
B、selection
C、proliferation
D、conviction
---Wouldyouliketogooutforawalkwithus?
---_____,butImustfinishmyhomeworkfirst.
A、Ofcoursenot
B、That’sallright
C、I’dloveto
D、Yes,Ido
Perhapsthecustomerhas____hismonthlystatementandnotpaidthebill.
A、omitted
B、bewildered
C、overlooked
D、escaped
Thelittleboydidn’tknow_______.
A、Whichhatishi
B、whichhathisis
C、whichhatwashis
D、whichhathiswas
Itisnecessarythatthestudents____moreexcercisestodo.
A、have
B、musthave
C、willhave
D、canhave