After having switched off the mains separator, wait for ___________ before switching it back on.
A: one minute
B: at least one minute
C: more than one minute
D: no more than one minute
A: one minute
B: at least one minute
C: more than one minute
D: no more than one minute
举一反三
- After having switched off the mains separator, wait for ___________ before switching it back on.
- Give me one more minute ____ I'll have finished.
- Bicycling and jogging are good exercise to train one’’s heart because they________. A: require a lot of strength B: are more interesting C: can reduce one’’s weight D: bring one’’s heartbeat to at least 120 a minute
- The weather there can be a bit _______- one minute it's blue skies and the next minute it's pouring down.
- A typical instant-messaging conversation lasts ________.( ) A: more than one hour B: at least half an hour C: at least one hour D: more than one place