_____ is known to us all is that America is a developed country _____ the First World.
| A．Which; belonged to | B．As; belonged to |
| C．What; belonging to | D．It, belonging to |
Only after my friend came ________.
| A．did the computer repair | B．he repaired the computer |
| C．was the computer repaired | D．the computer was repaired |
It’s a good habit to keep everything ________ in your study.
| A．in the way | B．in place | C．in hand | D．in case |
The angry boy looked at his mother and shouted out the words ________ in his heart for many years.
| A．having been hidden | B．hidden | C．hiding | D．to hide |
--- Any good way to get there on time? ---Only by ________.
| A．speeding up | B．turning up |
| C．taking up | D．putting up |
You must read the _______ with great care to see if the drug contains PPA before it is taken.
| A．instructions | B．introductions | C．explanations | D．Expressions |