Present Perfect Continuous. Choose the correct form.
1. We _____ since he came in.  talking  have talk  have talking  have been talking 2. Jose _____ since 9:00.  is cleaning  has cleaned  has been cleaning  has cleaning 3. They _____ for five minutes.  have been arguing  have argued  been arguing  were arguing 4. She _____ tennis professionally since she turned 13.  has been [...] MORE