--- How much homework has your cousin finished?--- _______ at all. He has sat there the whole morning, doing _______.
The earthquake ______ when I _______some cleaning.
---Let’s go hiking __________ staying at home, shall we? --- A good idea.
--- I’m sure Jack can win the competition this term.---Yes, I agree. _________ he works in his free time!
---I’m sorry I ______ my exercise book at home. ---Don’t forget _______ it to school tomorrow, please.
--- _______ can a tiger weigh, do you know? ---Yes, I know that a big one can weigh over 300 kilos.