Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.
A、if
B、wherever
C、sothat
D、whereas
Onlya(n)________fewwereinvitedtothedancingparty.
A、elect
B、special
C、select
D、selective
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
A、assure
B、secure
C、ensure
D、issue
Becareful,_______you'llfalldown.
A、onthecontrary
B、orrather
C、orelse
D、asfor
________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
A、Apart
B、But
C、Except
D、As