用所给动词的正确形式填空。
1. _______ (take) a bus is much faster than walking.
2. Simon spends a lot of time _______ (practise) playing basketball every day.
3. He with his friends _______ (play) football now in the playground.
4. I will go with you if it _______ (not rain) tomorrow.
5. Can you help me ________ (solve) the problem?