玛丽现在该到家了。(oughtto)（1.0分）

Therearethirtystudentsinourclass.Eightwillgohome;therest______tostayatschool. A: are B: oughtto C: should D: is

--Ididn’tseeheryesterday.Oh,butyou_______________. A: musthave B: oughtto C: shouldhave D: cannothave

Jeffery’sscoreonthelatesttestisthehighestinhisclass;he________havestudiedharder. A: may B: should C: must D: oughtto