1) I ______ (read) a book when the lights ______ (go) out. 2) She ______ (be) happy because she ______ (pass) her exam. 3) They ______ (play) soccer while we ______ (watch) TV. 4) He ______ (cook) dinner when the doorbell ______ (ring). 5) We ______ (be) at the beach when it suddenly ______ (start) to rain. 6) I ______ (walk) home while my brother ______ (ride) his bike. 7) The students ______ (study) when the fire alarm ______ (go) off. 8) She ______ (be) at the mall when she ______ (see) her friend. 9) I ______ (write) an email when my computer ______ (crash). 10) While they ______ (have) lunch, the phone ______ (ring). 11) We ______ (be) late because we ______ (miss) the bus. 12) He ______ (paint) the walls while she ______ (clean) the windows. 13) I ______ (be) at the library when I ______ (find) the book I needed. 14) She ______ (be) very tired because she ______ (study) all night. 15) While they ______ (play) video games, their dad ______ (fix) the car. 16) I ______ (fall) asleep while I ______ (listen) to music. 17) The kids ______ (watch) cartoons when their mom ______ (call) them for dinner. 18) He ______ (run) to catch the bus while it ______ (leave) the stop. 19) We ______ (be) excited because we ______ (win) the match. 20) While I ______ (wait) for my friend, I ______ (see) a rainbow.

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