Both his parents look sad. Maybe they_what happened.
A: knew
B: knows
C: have known
D: has known
A: knew
B: knows
C: have known
D: has known
举一反三
- Both his parents look sad. Maybe they ______what’s happened to him. A: knew B: have known C: must know D: will know
- Both his parents look sad. Maybe they_______ what's happened to him. A: knew B: have known C: know D: will know
- Both his parents look sad . Maybe they _________what's happened to him . A: konw B: must know C: have known D: knew
- Both his parents look sad . Maybe they _________what's happened to him. A: knew B: haveknown C: willknow
- Both his parents look sad. Maybe they __________ what’s happened to him.