____ a fine day, we decided to go for a picnic
A.Having been
B.Being
C.What
D.It being
He came to know that the knowledge from books can be useful only _____it is linked with practice
A.as
B.when
C.while
D.for
____, it is quite easy to drill a hole in it with laser.
A.Hard although a diamond is
B.As a diamond is hard
C.Hard as a diamond is
D.How hard is a diamond
Silk, printing, paper, the compass and powder originated in China, and____ introduction in the west had far reaching effects
A.these
B.their
C.those
D.its
The problem is believed ____ at the meeting two days ago.
A.to have discussed
B.to have been discussed
C.being discussed
D.having been discussed
Ultrasonic sounds produce pulsed signals ____various defects in metal can be detected
A.for which
B.of which
C.as a result of which
D.by means of which
In computer programming, this model is ____ to any of the others we have ever had
A.more superior
B.the more superior
C.the most superior
D.superior
The introduction of the coal pulverizing system in Daya Bay Nuclear Power Plant vastly reduces the time it took ____
A.to mill the coal
B.milling the coal
C.for milling the coal
D.while milling the coal
Some members suggested ____ a party for the visitor, but the Chairman didn’t approve
A.to arrange
B.arrange
C.arranging
D.to be arranging
If the maid comes today, please have her ____ my shirts
A.washed
B.washing
C.to wash
D.wash
