Hoàn thành câu

Dưới đây là các câu đã hoàn chỉnh:

1. My computer runs more smoothly after the update.
2. Jane speaks English more fluently than her classmates.
3. Emma works harder than anyone in the office.
4. Planes can fly higher than birds.
5. The Spanish athlete ran faster than the other runners.
6. Tom arrived earlier than I expected.
7. Tim works harder than anyone in his class.