Question

Complete the sentence using for , since , or ago
1 I have been using this bike _ the last ten years.
2 She spoke to him two years _
3 He has been waiting _ 2 o'clock .
4 My friend has been working _ hours .
5 They have been working in this office _ 1990.
​

Answer 1

Answer:

1.since

2.ago

3.since

4.for

5.since

Explanation:

Answer 2

Answer:

1. for

2. ago

3. since

4. hours

5. since

Explanation:

since- is used to show begining of time, month, year

for- is used to know the period to time.