单项选择
1．--- Stay a bit longer, please. It’s been such fun having you here.
--- Thank you, but I’ve got early start tomorrow morning.
A．/ ; the B．a; an C．/ ; an D．the; an
2． his own study with his classmates, Xian Li found he had fallen far behind.
A．Comparing B．Compared C．Comparing with D．Compared with
3．Miss Sophia, who is said to have immigrated to the US, at the No 2. Middle School in our city for ten years.
A．has been teaching B．was teaching
C．taught D．have taught
4．The seller would sell the jacket for 70 dollars, but the customer only half the price.
A．asked B．charged C．offer
