Кто знает. 1. peter was watching a documentary when the phone a) rings b) rang c) have rang 2. we take photos in the museum. it's not allowed! a) mustn't b) must c) should 3. if you wake up early, you late for work. a) be b) aren't being c) won't be 4. you all night. you must be exhausted! a) 've studied b) are studying c) 've been studying 5. they him a car when they find an inexpensive one. a) were buying b) buy c) will buy