Her book didn’t ____ children probably because she employed too many scientific terms.
A．appeal to B．apply for C．intend for D．refer to
After years of research, he found the key ____ differences between species.
A．to explain B．to explaining C．of explaining D．explaining
--- Do you know Anna’s telephone number?
--- ______. As a matter of fact, I don’t know any Anna, either.
A．I think so B．I hope so C．I’d rather not D．I am afraid not
I have two elder brothers, ____ in the army for ten years.
A．the elder of whom served B．the older having served
C．the older of which served D．the elder one has served
Everyone had an application form in his hand, but no one knew which office ___.
A．to send it to B．to send it C．to be sent to D．to have it sent
--- Come on, please give me some ideas about the project.
---Sorry. With so much work ____ my mind, l almost break down..
A．filled B．filling C．to fill D．being filled
