Task 4: Write the correct form of the words in brackets. 1. My mom often ________________ (buy) meat from the supermarket. 2. My brothers ________________ (not/ drink) coffee. 3. Look! Those people ________________ (climb) the mountain so fast. 4. That girl ________________ (cry) loudly in the party now. 5. What________________ (you/ do) in the kitchen right now? 6. I never ________________ (eat) potatoes before. 7. The 203 bus ________________ (set off) every fifteen minutes. 8. Tom (call) __________________ his boss yesterday. 9. I (meet) __________________ Robert at the supermarket this morning. 10. We (fly) _____________ to Ha Noi several times, but last summer we (go)______ there by train.

lấy 5 ví dụ về thì HTHT và mỗi ví dụ đều có (+) (-) (?)