Only after my friend came,____________.
A. did the computer repair B. he repaired the computer
C. was the computer repaired D. the computer was repaired
____________and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast.
A. Collected B. To collect
C. Having collected D. Collecting
In a good marriage, both husband and wife work hard to solve any problems that____________.
A. arise B. rise
C. arouse D. raise
This suggested that the matter can be converted into energy, and_______________.
A. in vain B. in chaos
C. as follows D. vice versa
To my astonishment, the handwriting on this cheque____________the one on that cheque.
A. is identical to B. is in agreement to
C. differ from D. vary from
It’s really a ____________topic whether to clone a human or not.
A. contradictory B. contrary
C. controversial D. confidential
