• Tìm từ không cùng loại với các từ còn lại. Ex: July May Mondaỵ September 1. late easy homework long 2. summer holiday spring fall 3. review keen interesting important 4. American Easter Christmas Thanks giving 5. typical hard lazy family 6. Christmas trees presents flowers wine

có tồn tại cặp (a,b) thỏa mãn ko -252a+72b=2013

Giải giúp mik vs các cao nhân ạ

Làm exercise 2 và exercise 3 hộ mình nha (ㆁωㆁ)

88. He _____ in this office for ten years by next Monday. A. will be working B. would be working C. will work D. will have been working 89. No sooner _____ the office than the telephone rang. A. was he leaving B. he was leaving C. had he left D. he had left 90. George______ this movie three times. A. sees B. had seen C. saw D. has seen 91. Food, air and clothes _______ necessary for life. A. is B. are C. were D. was 92. He ______ a visit to Halong Bay in 1995. A. has paid B. had paid C. paid D. pays 93. This morning while I ______ for the bus, the rain stopped. A. had waited B. was waiting C. have waited D. waited 94. What _____ during the last few weeks. A. were you doing B. did you do C. have you been doing D. had you been doing 95. Up to now, the teacher _______ our class five tests. A. has given B. had given C. gives D. is giving

Với giá trị nào của x thì các biểu thức sau có nghĩa

Đặt câu vs từng từ (các bạn có thể dịch ra hộ mình thì càng tốt) giúp mik với :((((((((((((((((((((((((((((((((((((((((

80. It ______ a long time since I last saw him. A. was B. is C. will be D. had been 81. Mr. John_______ to Los Angeles in 1992. A. was going B. had gone C. went D. has gone 82. What ______ to you yesterday? A. had happened B. has happened C. did happen D. happened 83. I never go to Australia. I _____ to Australia yet. A. will go B. went C. haven't been D. have been 84. My mother ______ in this factory since 1990 A. works B. worked C. had worked D. has worked 85. I _____ my hair before breakfast this morning. A. had washed B. have washed C. was washing D. washed 86. I _____ about him when he suddenly came in. A. am talking B. talked C. was talking D. talk 87. He will finish this work before you _______ here tomorrow. A. would leave B. are going to leave C. will leave D. leave

Giải giúp mình câu i và bài 4 với. Mình cần gấp lắm

Mọi người giải gấp giúp em với ạ Mai em thi rồi ạ