14. It's the coldest winter we__________ in Greece. A. Ever experience B. ever experienced C. were ever experiencing D. have ever experienced 27. Why did you buy all this sugar and chocolate? ~ I_________a delicious dessert for dinner tonight. A. Make B. will make C. am going to make D. will have made 28. Let's go! What's taking you so long? ~ I'll be there as soon as I__________my keys. A. Found B. will find C. find D. am finding 29.Next week when there___a full moon, the ocean tides will be higher. A. Is being B. is C. will be D. will have been 30. While I______TV last night, a mouse ran across the floor. A. Watch B. watched C. was watching D. am watching 31. Fish were among the earliest forms of life. Fish__________ on earth for ages and ages. A. Existed B. are existing C. exist D. have existed 32. The phone ________constantly since Jack announced his candidacy for president this morning. A. Has been ringing B. rang C. had rung D. had been ringing 33. The earth______on the sun for its heat and light. A. Is depend B. depending C. has depended D. depends 34. I don't feel good. I________ home from work tomorrow. A. Am staying B. stay C. will have stayed D. stayed 35. Today there are weather satellites that beam down information about the earth's atmosphere. In the last two decades, space exploration_________ great contributions to weather forecasting. A. Is making B. has made C. made D. makes 36. On July 20th, 1969, Astronaut Neil Armstrong_________ down onto the moon, the first person ever to set foot on another celestial body. A. Was stepping B. stepped C. has stepped D. was step 37. The plane's departure was delayed because of mechanical difficulties. When the weary passengers finally boarded the aircraft, many were annoyed and irritable because they___________ in the airport for three and a half hours. A. Are waiting B. were waiting C. have been waiting D. had been waiting