4. Choose the best answer:( cho mình xin câu giải thích nhé!) 1. Millions of Christmas cards ..........every year. A. were sent ; B. are sent ; C. send ; D. is sending 2. Jane saw her old friend while she ............. the street. A. crossed ; B. is crossing ; C. was crossing ; D. crosses 3. He had his father ............ his watch. A. fixed ; B. fixing ; C. to fix ; D. fix. 4. I saw him ............the flowers in the garden. A. watered ; B. be watered ; C. be watering ; D. watering 5. Paul is said ............ the brightest student in the class A. was ; B. to be ; C. being ; D. be 6. A contest in which participants have to fetch water from the river is called............. contest A. water- fetch ; B. fetching-water ; C. water-fetching ; D. fetch-water 7. ............... Easter, ma ny children and adults enjoy painting eggs A. On ; B. At ; C. During ; D. In 8. People in Ireland dance ............ Easter day to win prize cakes A. on ; B. at ; C. for ; D. in 9. In homes, present ............round the christmas tree on christmas day A. place ; B. is placing ; C. are placed ; D. placed 10. Thanks for inviting me to the rice-cooking............ A. meeting ; B. festival ; C. race ; D. crowd 11. What is special ...........the fire-marking contest? A. in ; B. at; ; C. with ; D. about 12. Six people from each team..........the event A. participate on ; B. participate in ; C. take a part on ; D. take a part in

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