47. People had already left the flooded villages when rescue workers arrived. A. People had already left the flooded villages by the time rescue workers arrived. B. People had already left the flooded villages as soon as rescue workers arrived. C. People had already left the flooded villages at the time rescue workers arrived. D. People had already left the flooded villages after rescue workers arrived

GIÚP MÌNH VỚI :(,KHÔNG THÌ LÀM MẪU CHO MÌNH CÂU A CŨNG ĐƯỢC :(

Lan’s house is 115 square meters wide, An’s house is 115 square meters wide, too. (using “size” ) Lan’s house

Ai lm giúp mik vs mình vote 5 sao

sửa các câu A BDC sai thành đúng giúp mik vpiwd

Tìm số nguyên tố $\overline{ab}$ (`a > b > 0`), biết $\overline{ab} - \overline{ba}$ là số chính phương

.Put the word given in the correct form. 1.The whole class is......to have small party today./HAPPINESS. 2.This shirt is too.........for me to buy./EXPENSE. 3.My son has a box of many.........crayons./COLOUR. 4.My Tam is a famous..............in Vietnam./Sing. 5.She works as a................in small school in the town./LIBRARY. 6.Let's go swimming now.The water is so.............../WARMTH. 7.I don't like the................of the sun in the summer./HOT. 8.I use this small book because it has blank papers for..........important notes./WRITE. 9.The boy is................and he wants to eat a cake./HUNGER.

Bằng những kiến thức em đã học em hãy nêu phương án để đổi chiều của một tia sáng song song có phương nằm ngang thành 1 tia sáng song song có phương thẳng đứng và có chiều từ trên xuống

Tinh Nhanh 1990 x 1990 - 1992 x 1998

làm cho mình đến câu 20 nha 21 càng tốt