I don’t know _____ he will be back home.
A: who
B: what
C: when
D: where
A: who
B: what
C: when
D: where
举一反三
- I don't know the man is cleaning the door. A: when B: where C: what D: who
- —Who is he Is he our new teacher —I’m sorry. I don’t know ______ and ______ he is. A: who; what B: who; how C: how; what D: where; how
- I don’t know ____ I should say. A: what B: where C: who D: that
- ---Do you know when he will come back tomorrow. ---Sorry. I don t know. When he back I tell you.
- I don’t know ____ he does. A: who B: what C: which