Question

Present perfect
The boys (give) many problems.
It (be) warm this week.
The pupils (study) for their exam.
He (go) just out.
My grandmother (lose) weight.
We (want) always to visit Spain.
They (not/go)shopping yet

Answer 1

1) have given
2) has been
3) have studied
4) has gone
5) has lost
6) have wanted
7) haven't gone