根据句意和首字母提示，补全各小题单词。
小题1:Please give me a hand. I’m not tall e_________ to reach the book on the top of the bookshelf.
小题2:We must f__________ the teacher’s instructions when we are in the lab.
小题3:He has some t__________ understanding what his teacher says because of his poor English.
小题4:It is usually very hot in June, but s__________ it can be cool.
小题5:Don’t disturb him. He is busy w__________ an important report.
