根据句意，写出括号内所给单词的适当形式。
My father will go to Beijing on business at the   ____      (begin) of next month.
I couldn’t fall ___________ (sleep) because I drank too much coffee in the daytime.
Who do you think did _____________(badly) in this competition, John, Jim or Jane?
--- Is the fruit salad __________(finish)? --- You’d better wait for five more minutes.