BULATS Vocabulary & Language Use 1

Complete the phrases with a correct preposition. There is an extra you do not need to use.
a) I am writing to apologise ❌ our failure to send your order.
b) We are worried ❌ security issues.
c) You can learn more about this ❌ the Arabic support page.
d) I want to congratulate you ❌ your recent promotion.
e) We would be happy ❌ work with you.
f) I am writing ❌ reference to your purchase.

for
for
about
about
at
at
on
on
to
to
in
in
with
with