1) I stayed at home _______ it was raining heavily. a) so b) when c) as d) because 2) She passed the exam _______ she had studied very hard. a) so b) when c) as d) because 3) We couldn’t go to the park _______ it was closed for maintenance. a) so b) when c) as d) because 4) He was late for work _______ his car broke down on the way. a) so b) when c) as d) because 5) I like this book ________ it has an exciting plot and memorable characters. a) so b) when c) as d) because 6) They chose this hotel _______ it offers a free breakfast and a swimming pool. a) so b) when c) as d) because 7) The concert was cancelled _______ the main performer got sick. a) so b) when c) as d) because 8) I wear sunglasses in summer ________ the sun is very bright. a) so b) when c) as d) because 9) She learned Spanish ________ she planned to move to Mexico. a) so b) when c) as d) because 10) The children were excited _______ their favourite cartoon was about to start. a) so b) when c) as d) because 11) It was getting dark ______ I turned on the lamp. a) so b) when c) as d) because 12) She forgot her umbrella ________ she got wet in the rain. a) so b) when c) as d) because 13) The movie was too long _______ we decided to leave halfway through. a) so b) when c) as d) because 14) I had a lot of work to do ________ I stayed at the office until late. a) so b) when c) as d) because 15) The soup was too spicy _______ I drank some water to cool my mouth. a) so b) when c) as d) because 16) He saved money for months _________ he could finally buy a new laptop. a) so b) when c) as d) because 17) The bus was crowded ________ we chose to walk instead. a) so b) when c) as d) because 18) They arrived early _______ they had time to explore the city before the meeting. a) so b) when c) as d) because 19) The weather was perfect _________ we organized a picnic in the park. a) so b) when c) as d) because 20) I didn’t understand the instructions __________ I asked my colleague for help. a) so b) when c) as d) because 21) I always drink a glass of water ________ I wake up in the morning. a) so b) when c) as d) because 22) She feels nervous _______ she has to speak in public. a) so b) when c) as d) because 23) We usually go for a walk _________ the weather is nice. a) so b) when c) as d) because 24) He smiles _______ he remembers his childhood summers at the seaside. a) so b) when c) as d) because 25) The cat hides under the sofa ________ it hears loud noises. a) so b) when c) as d) because 26) I check my emails _______ I get to the office. a) so b) when c) as d) because 27) They decorate the house with lights ________ Christmas approaches. a) so b) when c) as d) because 28) She always wears a hat _______ the sun is strong to protect her head. a) so b) when c) as d) because 29) We turn on the heater ________ the temperature drops below 10 °C. a) so b) when c) as d) because 30) He starts preparing dinner ______ he gets home from work. a) so b) when c) as d) because

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