20. Choose the correct tense forms. My father ... them last month but they ... yet.

a) invited, hasn't come
b) invites, hadn't come
c) invited, hadn't come
d) has invited , hasn't come
e) had invited, hasn't come

21. Choose the correct tense form.

When my son is 18, my husband and I ... retired already.

a) are going to be
b) would be
c) would have been
d) are
e) were

22. Choose the correct tense form.

Don't come at lunch time, I ... with my family.

a) will eat
b) will be eating
c) will have eaten
d) eat
e) ate