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ngohienchinh77
2 năm trước
Tại sao khi cho canxi cacbua tác dụng với nước ta thu được axetilen còn cho nhôm cacbua tác dụng với nước ta lại thu được metan?
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Rewrite the sentence so that it means the same as the first one, using "if / unless" amd the conditional sentence - type 1 1, You will run out of money if you don't stop washing it -> Unless ________________________________ 2, James will not pass the test unless he studies harder -> If _________________________________ 3, Don't call me unless it is an emergency -> If __________________________________ 4, If Jane finishes her work before 6pm, she will dine out with her friends -> Unless _____________________________ 5, My brother won't go travelling this summer if he doesn't find a companion -> Unless _______________________________ 6, It is not easy to do this exercise unless you listen attentively to the teacher -> If _____________________________________ 7, If Jim doesn't submit his essay before Tuesday, he will be punished by his teacher -> If ____________________________________

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