It’s hard for us to make a choice, which means we have not decided _____.
.Have you considered the students’ request _________ the school library _______ more books on popular science?
A person ______ e-mail account is full won’t be able to send or receive any e-mails.
.It is obvious to the students ______ they should get well prepared for their future.
.I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian gets back.
The house I grew up ________ has been taken down and replaced by an office building.