全真模拟试题?
1. ?____? a fine day, we decided to go for a picnic.?
A. Having been
B. Being
C. What
D. It being?
2. 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?
3. ?____?, 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?
4. 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?
5. 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?
6. 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?
7. 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?
8. 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?