Public service ads，also PSAs，often _________ for free，_________ to educate people about health，safety or any other problem that affects public welfare.
| A．run；meant | B．are run；are meant |
| C．are run；mean | D．run；are meant |
It was only when I read this story for a second time ________to appreciate its beauty.
| A．that did I begin | B．had I begun | C．then I began | D．that I began |
Everybody showed great respect to the old doctor, who devoted everything he had to _____ the poor conditions of the local hospital.
| A．improving | B．improve | C．improved | D．being improved |
— Forgotten something? I can keep an eye on your kids if you want to go and get it.
—______
| A．It’s very kind of you. | B．Oh. how careless of me! |
| C．I might as well go and got it. | D．Well, I can do without it. |
The engine just won't start. Something seemswrong with it.
| A． | to go | B． | to have gone | C． | going | D． | having gone |
A Midsummer Night’s Dream ______at the Theatre Royal on 19th June, and then tours throughout Scotland.
| A．opens | B．is opened | C．will open | D．will be opened |