1. In many cultures, knocking on wood is a way to chase away bad spirits. (Chọn a vì "way" là danh từ không đếm được.)

2. American people often watch a ball drop at midnight in Times Square. (Chọn a vì "ball" là danh từ đếm được số ít.)

3. There is at least an ornamental tree in my house every Tet holiday. (Chọn an vì "ornamental" bắt đầu bằng nguyên âm "o".)

4. I have to go. I’m in a hurry. (Chọn a vì "hurry" là danh từ không đếm được.)

5. Mr. Lu goes hunting in the forests twice a month. (Chọn a vì "month" là danh từ đếm được số ít.)

6. Do you have a milk jug? (Chọn a vì "milk jug" là danh từ đếm được số ít.)

1.In many cultures, knocking on wood is an way to chase away bad spirits. (an indefinite article - refers to any way)

2. American people often watch a ball drop at midnight in Times Square. (an indefinite article - refers to one specific ball drop on a particular occasion)

3. There is at least an ornamental tree in my house every Tet holiday. (an indefinite article - refers to one tree, but it doesn't specify which one)

4.I have to go. I'm in a hurry. (an indefinite article - refers to a general state of being hurried)

5.Mr. Lu goes hunting in the forests twice a month. (a definite article - refers to a specific unit of time, "a month")

6.Do you have a milk jug? (an indefinite article - refers to any milk jug, not a specific one)