--- I ______ so busily recently that I ______ no time to help you with your math. --- That’s OK. I can manage it by myself.
We are invited to a party______ in our club next Friday.
Tony was very unhappy for ______ to the party.
____ to hospital in time, the wounded soldiers were saved at last.
It’s time that I ______ home, but I’m enjoying myself, so I will stay here a bit longer.
–Sorry, Professor Smith. I didn’t finish the assignment yesterday. --Oh, you _____ have done it as yesterday was the deadline. A. must B, mustn’t C, should D. shouldn’t