根据括号中所给的汉语写出单词,使句子意思完整正确。
Look! The girls are dressing up as _________(蝴蝶), how beautiful!
These days the picture on the wall often_____(提醒) me of the old days in the countryside.
Do you have any ______________ (困难) with your studies these days?.
Our Math teacher spent about 2 hours __________(解释) the problem to us.
I’m afraid we only have a single room __________(可得到的) for that week.