Complete the sentences with 'can' or 'can't'. 'Oh dear! Where's my key? I (1) ______ find it. Oh look! It's on the kitchen table. I (2) ______ see it. Now what am I going to do? I (3) ______ get in. I (4) ______ climb the tree to the window on the first floor. It's too high. I (5) ______ phone for help because I haven't got my mobile with me. Hey, what's that noise in the sitting room? I (6) ______ hear something. Oh good, it's Peter. He's at home. Brilliant!'