I really don’t know _________ I put my wallet after I paid the bill．
A. where was it B. it was where that
C. where was it that D. where it was that
During the examination we are required to stay in our seats, keep our eyes on our work, ____ to anyone.
A. instead of speaking B.rather than speak
C. and not to speak D. but would not speak
________ these experiments were successfully completed would we think of going into humans.
A. If only B. Only if C. So that D. Even if
Currently, many American women are still faced with the ________ of choosing between work and family commitments.
A. desperation B.dilemma C. confusion D. Concern
Tony ________ full marks, but he was so careless as to make a spelling mistake.
A. could have gained B. can have gained
C. must have gained D. must gain
Recently some Japanese have been trying to make conflicts with China, ________ effects we are greatly concerned.
A. to whose B. about whose C. to which D. about which
