how to solve the problem, the little boy turned to his father for help.
| A．Not knowing | B．Having not known |
| C．Not having been known | D．Not known |
They _______to finish the task before July, but they didn’t make it because of the terrible weather.
| A．succeeded | B．managed | C．attempted | D．thought |
Tom is a stubborn and careful man; It took many hours to_______ him of my good idea and to give up his.
| A．ask | B．convince | C．remind | D．accuse |
The monitor wanted to buy two_______ stamps, but the salesgirl only sold him_______ these stamps.
| A．scores of; dozens of | B．scores; dozen of |
| C．score of; dozen of | D．score of; dozen |
I spent most of my money in the first week and________ had very little to eat by the end of the holiday.
| A．besides | B．however | C．consequently | D．frequently |
He gets fifty thousand pounds a year ______I get twenty million, which makes me upset.
| A．since | B．while | C．when | D．as |