----- Nội dung dịch tự động từ ảnh ----- Task 9. Mark the letter A, B, C or D to indicate the mistake in each of the following sentences and correct it. 1. We have learnt a lot about the culture of ethnic groups since we arrive there. A. have learnt B. ethnic C. since D. arrive 2. He just has given a performance that was both touching and brilliant. A. just has B. performance C. was D. touching 3. Going snorkelling was the most exciting activity I have ever experienced. A. snorkelling B. was C. most D. ever experienced 4. Did you ever felt helplessness when being unable to put up tents? A. Did B. helplessness C. unable D. put up
