Much labor would have been saved if the electronic computers_____________ before.
A.had invented | B.were invented |
C.should have been invented | D.had been invented |
I’m sorry,I can’t give you the telephone number without
Mr.Smith’s________.
A.permission | B.allowing |
C.agreement | D.performance |
On the top of Mount Tai,you can get a wonderful________of the sunrise.
A.view | B.scene |
C.sign | D.sight |
Seeing the happy________of children playing in the park,I’m full of joy and confidence in the future of our country.
A.sight | B.scene |
C.view | D.sign |
After five hours’ drive,they reached________they thought was the place they had been dreaming of.
A.where | B.what |
C.which | D.that |
Professor Backman took up scientific research for decades,and this is________he devoted all his life to.
A.which | B.what |
C.where | D.how |