Since your mother is often ill, remember to keep a first-aid medicine box close ____ hand all the time.
A: up
B: at
C: on
D: down
A: up
B: at
C: on
D: down
举一反三
- First aid is... A: Medical care given in a Hospital. B: Emergency care given to an injured or suddenly ill person. C: Your first visit to a clinic to diagnose an illness. D: The first time you get scholarship aid from your school.
- Keeping your laptop _________ all the time will kill its battery faster. A: turned down B: plugged in C: turned up D: plugged on
- We no longer keep up the close friendship of few years ago, though we still visit each other on occasion. A: in good time B: up to date C: now and then D: once and for all
- Important people don’t often have much free time because their work ______ all their time. A: takes over B: B．takes away C: takes in D: D．takes up
- The scientists of the research center keep the good habit of summing up their experience ______ time to time.