根据句意和汉语提示，用适当的短语补全句子。
1.Today our English teacher ________________(看上去很严肃).
2. Now my brother ________________(对……更感兴趣) playing basketball.
3. He is only a child. Of course he (对……感到害怕) being alone.
4. Both my brother and sister are ______________(学校乒乓球队队员).
5. We were unable to ___________(入睡) last night because of the noise outside.
