After _________ seemed like hours, a nurse wheeled Doris out of the emergency room.
| A．that | B．there | C．which | D．what |
It has been proved _______ eating vegetables in childhood helps to protect you against serious illnesses in later life.
| A．if | B．that | C．what | D．when |
It is reported that the United States uses ____ energy as the whole of Europe.
| A．as twice | B．twice much | C．twice much as | D．twice as much |
________ you are interested in astronomy, you can read the book.
| A．Even if | B．Now that | C．Unless | D．As soon as |
_________ parents say and do has a life-long effect on their children.
| A．That | B．Which | C．What | D．As |
It is reported that two schools, ___________ are being built in my hometown, will be open next year.
| A．they both | B．which both | C．both of them | D．both of which |