-- - Alison, I’m sorry. I can’t come to the wedding with you tomorrow morning. 
-- ________? -- My grandma was severely ill, so I have to stay in the hospital to look after her.
| A．How is it | B．How come | C．So what | D．What’s the problem |
Mary is a(n) _______ customer, so the waiter knows her likes and dislikes.
| A．usual | B．ordinary | C．common | D．regular |
Recently I bought a ticket for Shanghai World Expo, _______ was very reasonable.
| A．the price of it | B．whose price | C．the price of whose | D．the price |
—I’d like to call you at 10 o’clock next Friday morning if it is convenient.
—I’m afraid I _______ an important meeting.
| A．will have attended | B．will be attending | C．will attend | D．would attend |
What some teenagers don’t realize is ____ difficult life can be if they get addicted to drugs.
| A．how | B．what | C．that | D．why |
_______ in the book, he didn’t notice my coming.
| A．Absorbing | B．Absorbed | C．To absorb | D．Being absorbed |