根据句意，用括号中所给单词的适当形式填空。
【小题1】You shouldn't keep me __________(wait) for so long time at the gate.
【小题2】He can sit all day long without __________(say) a word.
【小题3】It's necessary for you to make plans to _____(see) your friends in Switzerland.
【小题4】It's too difficult for me to ________(finish) the task in such a short time.
【小题5】I felt __________(relax) lying in the sun. What a good time!