Put the verb in bracket into the present perfect tense and insert SINCE or For

1:...the last two years, clothes...(be) very cheap.

2: coal...(become) dearer... the end of last year

3: i...(write) ten letters... breakfast

4:...(not/see) my friends lately?- not ... 3 days

5:i...(not/see) him... more than a week

6:How long...(you/wait)?-... half an hour

7:That boy...(not/wash) his face... this morning

8:i...(not/have) a good night's sleep...last week

9:she...(practice) the piano... 6000

10: henry...(not/have) a holiday... the year before last