the difficult maths problem, I have consulted Professor Russell several times.
| A． | Working out | B． | Worked out | C． | To work out | D． | Work out |
The girl ___ in front of me kept laughing and crying.
| A．sat | B．sits | C．seated | D．seating |
--Do you hear a fire ___ last night?---Yes, it __ by the firemen in no time.
| A．broke out, was put out | B．was broken out, was put out |
| C．went out ; was put out | D．broke out; gone out |
What he said sounds ___.
| A．nicely | B．very well | C．very strange | D．to be nice |
--What’s ___ at the theatre this evening ?---It's ____ Comrade Leifeng.
| A．in ; on | B．about; on | C．on, about | D．on, for |
When he was ten, Edison ___ a small lab of his own.
| A．set up | B．set off | C．set out | D．set in |