Write a time word in each gap----- Nội dung dịch tự động từ ảnh ----- esent perfect simple, past perfect simple 2 Write a time word in each gap. had a dream where you 1 Have you eiser took a test you hadn't revised for? 2 Jo's had her driving licence 3. I'd never taken an important exam so I was extremely nervous. on May. 4 You can't have finished your homework You've only started! 5 Haven't you done your report Hurry up then! 6 I've won three swimming trophies far, and I'm hoping to get another one this year. 7 That was an amazing vocal performance, especially since you've had singing lessons. 8 We wrote an essay three weeks ago but Mr Blake hasn't given it back with our marks! 3 Write one word in each gap. What Einstein taught us almost certainly heard of Albert Einstein, but do you know why he was so important? Before Einstein, all thought that time was constant. In other words, that three seconds is three seconds wherever you are in the universe, and whatever you're doing. Einstein showed that's not true and that how time passes is related to how fast You (1) scientists (2) you're moving. No-one had (3) before Einstein. suggested this But (4) anyone ever tested this incredible idea? The answer is yes, they (5) proved it many times (6) with it in the early 1900s. For example, scientists have taken two atomic clocks, both showing exactly the same time, and have (7) _.They've tested and Einstein first came up one round the world in a plane. It ran a little bit faster than the clock which (8) stationary on the ground. Today, clocks in GPS systems and satellites have to take this theory into account. remained INI |