—Will you please stay for lunch?—Sorry,I .My mother wants me to go back home now.A.needn’t B.can’t C.mustn’t
–Do you know the man under the tree? --Sorry, I don’t know _______.
–Waiter, $ 20 for dinner, right? --I’m afraid $25, sir, for drinks are ________.
–How many students are there in the classroom? --__________. They are all in the lab.
–Why are you still waiting in line? --I’ve missed my _______ .
You’ve given me so much help. I really _______ it.