mn giúp em với ạ Rewrite the sentences, using the present perfect or the present perfect continuous with the given word in the brackets. 1. Mary is staying at a homestay during her undergraduate programme. The programme began three weeks ago. (for) Mary ____________________________________________________________________________ 2. The university started building a new campus in May. They are still building it. (since) The university ____________________________________________________________________ 3. He attended two online vocational courses: one in 2012 and the other in 2013. (twice) He ____________________________________________________________________________ 4. They visited this college in 2009, 2012 and 2014. (three times) They ____________________________________________________________________________ 5. They started rebuilding our school 4 months ago. (for) Our school has ____________________________________________________________________________