It’syourjob________thepopstars.
A、introduce
B、introducing
C、introduces
D、tointroduce
The____populatedareawasabreedingplaceforinfectiousdiseases.
A、densely
B、sparcely
C、improperl
D、poisonous
Didyouattendthemeetingyesterday____Marytalkedalot?
Marykeepstalkingabouttheparty.Shehadaverygoodtime,______she?
A、hadn't
B、had
C、didn't
D、did
GreatasNewtonwas,manyofhisideas____todayandarebeingmodifiedbytheworkofscientistsofourtime.
A、aretochallenge
B、maybechallenged
C、havebeenchallenged
D、arechallenging