I found _________difficult to work out the problem.
A it’s B this C that D it
The magazine___________ be Lily's, for we can find her name on the cover.
| A．may | B．might | C．could | D．must |
— Have you seen______ pen? I left one here this morning.
— Is it___________ black one? I think I saw it somewhere.
| A．the; the | B．a; a | C．the; a | D．a; the |
Harry Potter is so
interesting a book that lots of teenagers like to read _
| A．it | B．this | C．that | D．one |
— Could you please pass me the book?
| A．Yes, I could | B．No, I couldn't |
| C．Sure. Here you are | D．No, that's no problem |
- I wore sports shoes to the bal yesterday evening by mistake!
- Oh, dear, you must be very _____ at the bal!
| A．embarrassed | B．satisfied | C．tired | D．surprised |