If only I＿＿＿＿＿how to operate a computer as you do!
| A．had known | B．wou欤?know | C．should know | D．knew |
– Have they found out the _____ of the fire?
-- Yes. It was a cigarette end that _____ the fire.
| A．cause; started | B．reason; caused |
| C．causing; caused | D．reason; cause |
She did not take the advice that she ___ at rush hour, so she got lost.
| A．not travel | B．did not go | C．should travel | D．goes shopping |
In the last ten years she _____ like this; she is killing her health.
A. works b. has been working C. worked D. is working
The policemen are searching for the ____car on the highway.
| A．damaging | B．damaged | C．destroying | D．destroy |
Driving the halfway I _____ my car was out of gas.
| A．noticed | B．find | C．found out | D．saw |