After 15 years in the USA, he has finally decided to American citizenship.
| A．concentrate on |
| B．apply for |
| C．look out for |
| D．appeal to |
On ________ Friday when Tom was having an art lesson，as he had no color pencils with him，he drew ________ blue sun with his pen.
| A．/；the | B．/；a | C．the；the | D．a；a |
—Who called me this morning?
—________ Mr.Li.He asked you to visit Shenzhen and said that ________ Shenzhen today is different from what you saw thirty years ago.
| A．/；/ | B．A；/ | C．/；the | D．A；the |
What ________ surprise to see you here!
| A．the | B．/ | C．a | D．an |
________ walk is expected to last all day，so bring ________ packed lunch.
| A．A；a | B．The；/ | C．The；a | D．A；/ |
—I find it very difficult to read ________ novel you lent me last week.
—Yes.It's necessary to have ________ good knowledge of history.
| A．the；/ | B．a；/ | C．the；a | D．a；a |