They （） this boy for quite a few days before they found him.
A: have looked for
B: had looked for
C: have been looking for
D: had been looking for
A: have looked for
B: had looked for
C: have been looking for
D: had been looking for
举一反三
- Jane, have you seen my sunglasses anywhere? I for them all morning. A: had looked B: have been looking C: am looking D: was looking
- Your mother ______ for you everywhere. When have you been? A: has looked B: has been looking C: looked D: was looking
- Look at this ! I （）some magazines and （） this letter. A: was looking through; found B: am looking through; find C: looked through; had found D: had looked through; finding
- ______ I had been looking for two days, I found her at last.
- ________ back on its history, we have found that the company has been making steady progress. A: Look B: To look C: Looking D: Looked