1.Therearefivepairs____,butI'matlosswhichtochoose.
Atobechosen
Btochoosefrom
Ctochoose
Dforchoosing
2.Aftersheconsideredtheproblem,shegotatallboxtostand_____.
Aby
Bon
Cup
Dwith
3.CharlesBabbageisgenerallyconsidered______thefirstcomputer.
Atoinvent
Binventing
Ctohaveinvented
Dhavinginvented
4.'WhereisDavied?""Heisupstairs____readytogoout."
Atoget
Bgetting
Ctobegetting
Dhavinggot
5.Withalotofdifficultproblems_____,thenewly-electedpresidentishavingahardtime.
Asettled
Bsetting
Ctobesettled
Dbeingsettled
6.Ifthecarwon'tstart,____it.
Atrypush
Btrypushing
Ctrytopush
Dtotrypushing