The students are tired after playing soccer___ ___ ___.（两小时）

The students are tired after playing soccer___ ___ ___.（两小时）
The students are tired after playing soccer___ ___ ___.（两小时）

The students are tired after playing soccer___ ___ ___.（两小时）
The students are tired after playing soccer_for__ _two__ _hours__.（两小时）

for two hours