She has to help her mom ________ dinner today.
—— ______ TV do you watch every day?——About two hours.
The farmer didn’t know ________ .
——Excuse me, but could you please turn the radio down?——Sorry, I _________ you could hear it.
——Bill had nothing for breakfast this morning , ?.—— , he got up too late.
A hard-working man _____ become a great scientist, but a great scientist _____ be a hard-working man.