Help Agent 007-and-a-half finish his top-secret mission report by dragging the right words into the blanks.

"Yesterday, I couldn't sneak past the laser beams because I sneezed loudly. Now, the commander says I can't touch any of the explosive gadgets."

"Yesterday, I couldn't sneak past the laser beams because I sneezed loudly."

We use couldn't to describe an inability to do something in the past. The word "yesterday" is your clue!

"Now, the commander says I can't touch any of the explosive gadgets."

We use can't for a present lack of permission (prohibition). The commander "says" (present tense) that it is currently not allowed.