【单选题】
First please be ( ) during your travel，otherwise we will waste time.
①
on time
②
in time
③
at the time
④
by the time
【单选题】
21. Take good care to _____ your jewelry before going on away on holiday..
①
safe
②
lock in
③
lock away
④
lock with
【单选题】
Our civilization cannot be thought of as ____ in a short period of time.
①
to have been created
②
to be created
③
having been created
④
being created
【单选题】
9. They have ______ each other for a long time.
①
corresponded on
②
corresponded with
③
communicated with
④
kept writing
【单选题】
You [填空] look for exercise opportunities all the time.
①
should
②
should to
③
goes
④
needs
【单选题】
It is a huge task to ______ all the rooms in the building in such a short time.
①
go ahead with
②
keep up
③
clean up
④
work out