23.I’d love to join your visit to a local museum today, but I’m on a very ____ schedule —I’ve got a lot of work to do today.
Energy drinks are not allowed _______ in Australia but are brought in from New Zealand.
The disaster is so serious that the people in that area really have a lot of difficulty ______ with their lives.
Having a walk after supper is certainly good for the old people, but it remains ______ whether they will enjoy it.
If better use is _______ your spare time, you will have a more brilliant future.
The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.