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Linh263
2 năm trước
Tính bằng cách hợp kí a,5.25.2.16.4 c,1+3+5+7+9...+2013 d,1+2+3+4+...+n e,36.28+36.82+64.69+64.41 g,100+98+96+...+2-97-95-...1 f,2.3.12+4.6.42+8.27.3
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I. Complete the sentences with the past simple or past continuous form of the verbs in brackets. 1.My car __________(break) down when I _____________(drive) home from work. 2.Alan _____________(look) out of the window when he_______(see) a UFO. 3.When he _______(see) me, he ______(fall) off the wall. 4.We _____________(try)to log on when the Wifi __________(stop) working. 5______ Jim _________(smoke) when he _________(turn) on the gas? 6.She ________(be) so tired that she _______(sleep) for twelve hours. 7.The tortoise _____________(run) while the hare _____________(have) a nap. 8.I _________(phone) you four times last night but you _____________(sleep). 9.The police_______(ask) them lots of questions before they ________(release) them. 10.While the children __________(surf) the Internet, they __________(find) a really interesting website about music.

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