đưa một thước đã nhiễm điện lại gần một dòng nước đang chảy ra từ vòi nc ta thấy dòng nc ko chảy xuống theo phương thẳng đứng nữa mà hơi bị cong đi một chút theo em dòng nc bị cong về phía nào hãy giải thích tại sao

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Exercise 1: Choose the best option to complete each of the following sentences. 1. All the food in the refrigerator _______ eaten, and it is empty now. A. are B. is C. have been D. has been 2. The Vietnamese people ____________ a heroic people. A. is B. are C. was D. were 3. That the committee members cannot agree with each other about solving that crisis ___________ caused a serious problem. A. is B. was C. has D. have 4. "Who has been planning tee dance?” “Everyone in the class ____________” A. is B. has C. are D. have 5. The elderly in my country ___________by their children and grandchildren. A. is cared for B. care for C. cares for D. are cared for 6. The actor and the circus performer ___________ to the party tonight. A. is going B. are going c. goes D. go 7. The grey and blue blanket __________ yesterday. A. was washed B. was washing c. were washed D. were washing 8. Two hours’ study _________ enough for him to prepare a quiz. A. is B. are c. has D. have 9. I no less than he ________ blissful to see her. A. are B. is c. am D. be 10. It ___________ these questions that ___________ difficult. A. are - are B. is-are c. are - is D. is – is 1 1. Mumps __________ usually caught by children. A. are B. was c. is D. were 12. Seven twelfths of the men __________ another language. A. speak B. speaks C. is spoken D. are spoken 13. Two kilos _________ pretty small for a newborn baby. A. makes B. make c. are D. is 14. A basket of apples, oranges, and bananas _________ sent to my husband by his grandparents last Christmas. A. has been B. have been c. was D. were 15. The Dean and Lexicology lecturer _______ in the lecture theatre then. A. were B. was c. have been D. has been