Must I do the math exercise step by step? — Of course You can never be _____ careful with that [ ]

May I speak to Jim, please—Sorry, ____ now.

Have you mended your shoes, Bob—Yes, I _________ them twenty minutes ago ．

The family ________ on time, but their car had a flat tyre on the halfway.

Tell me something about your adventure in the rainforest, please.—We lost our way in the forest and ___ made matters worse was ___ night began to fall.