His aunt __________(do) some cooking when he came in.
举一反三
- Andy ______ cooking dinner when he came in.
- He pretended _________ when his mother came in.
- Mike had already (lie) ______ down when he came in.
- --- Do you remember ______ he came? --- Yes, I do, he came by car. A: how B: that C: if D: when
- He _______ when the teacher came in. A: A.sang B: B.has sung C: C.was singing