cho tam giác ABC vuông tại A. Hãy tính tỉ số lượng giác của các góc B và C, biết AB=3cm, AC=4cm.
V Use the correct form of these words to complete each sentence.
1. Scientists are seeking the best ways to deal with the …………….. environment impact of pollution.
2. It’s …………….. in America to eat turkey on Thanksgiving Day. tradition
3. Peter has a lot of woolen …………….. to wear in winter. scarf
4. The hand-woven textiles were made by skilled local …………….. art
5. I have discovered the …………….. differences between the two culture