It remains doubtful ______ immediate measures could be taken to prevent underground water pollution.
| A．how | B．whether | C．that | D．where |
_____ the city’s public school system should be open to the children of migrant workers has become the focus of discussion.
| A．That | B．What | C．Whether | D．If |
______ in the regulations is that you _____ other people the password of your e-mail account.
| A．What is required; not tell | B．As is required; shouldn’t tell |
| C．It is required; not tell | D．It requires; shouldn’t tell |
___ in the regulations is that you ___ other people the password of your e-mail account．
A．What is required; not tell B As is required; shouldn't tell
C．It is required; not tell D．It requires; shouldn't tell
______ made the school proud was ____ more than 90% of the students had been admitted to the key universities.
| A．What ; because | B．What ; that | C．That ; what | D．That ; because |
It was _______ you had done _______ made it possible for you to improve your English.
| A．that ; that | B．that;what | C．what; what | D．what;that |
Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
| A．it; what | B．what; what | C．what; it | D．it; it |
_______ excited her parents most was that he was admitted to his dream college.
| A．That | B．What | C．Which | D．It |
It’s exactly ______ we do ______ has changed the world.
| A．which; that | B．how; that | C．how; what | D．what; that |
It is still under discussion _________ the old bus station should be replaced with a modern hotel or not.
| A．whether | B．when | C．which | D．where |
He left home without saying a word, and _______ worries many people and is to be found out.
| A．where he has gone | B．where did he go |
| C．which place has he gone | D．where has he gone |
It still remains a question _____ life exists on any other planet in the solar system.
| A．why | B．whether | C．how | D．where |
_____ John won a gold medal in the English competition really excited his family.
| A．That | B．when | C．which | D．what |
______ wants to stay in a hotel has to pay their own way.
| A．Anyone | B．The one | C．Whoever | D．No matter who |
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