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pick up take off put off give away
needn’t mustn't couldn’t wouldn't
couldn’’t mustn’t needn’t wouldn’t
hot air hot boiler water cylinder water hot seawater
The cold front overtaking the warm The warm front following the cold The depression extending from its center The formation of bad weather belt"
in action at ease on work on watch
in action at ease on work on watch
next close to to far from
are dropped drop are being dropped have dropped
are dropped drop are being dropped have dropped