1. the keys already a) were found b) found c) have been found d) was being found 2. the book twenty years ago a) is written b) was written c) have been written d) had been written 3. the first stamp in england in 1837 a) invented b) is being invented c) was invented d) will be invented. 4. red square by millions of tourists next year. a) is visited b) visit c) has been visited d) will be visited 5. every year thousands of presents before new year. a) will be sold b) are sold c) have been sold d) are being sold