Detect if this sentence contains any incomplete thoughts and provide a corrected version.
He was worried about passing the test but smiled.
This sentence appears to contains a complete thought. No correction is necessary.
Complete the following task based on the instruction and optional input provided.### Instruction:
Detect if this sentence contains any incomplete thoughts and provide a corrected version.

### Input:
He was worried about passing the test but smiled.

### Output:
This sentence appears to contains a complete thought. No correction is necessary.