What I need is _____ book that contains _____ ABC of oil painting.（）
| A． | a; 不填 | B． | the; 不填 | C． | the; an | D． | a ; the |
We _________ the difficulty together, but why didn’t you tell me?
| A．should face | B．might face | C．must have faced | D．could have faced |
________ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
________ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
— Can I have a day off tomorrow, Mr. Johnson?
— ________. I can manage without you.
| A．Forget it. | B．I’m afraid not. | C．It depends. | D．Of course. |
The newcomer went to the library the other day and searched for ________ he could find about Mark Twain.
| A．wherever | B．whatever | C．however | D．whichever |