For and since

Andrew is a very hard-working student. It's midnight and he is still working at his computer. Write sentences with the present perfect and for or since.

► be / at his computer / six hours He's been at his computer for six hours.

1 not / have / any fun / a long time ................................................................

2 have / a cold / a week ………………………………………..

3 not / see / his friends / ages ………………………………………

4 not / do / any sport / last year ………………………………………

5 be / busy with his studies / months .............................................. …………