Put the verbs in brackets into the correct tence form.                                                               1._________ the children ______________ (to prepare) the concert by the end of July?               2. They _________ (to climb) the mountais two weeks ago.                                                     3. __________ you ever __________ (to be) to the summer school of English?                         4. What ________ Mark and steve _______ (to do) at that time yesterday?                               5. Where ________ they _______________ (to go) next month?                                               6. __________ the girls _______ (to discuss) the cultural presentation now?