If being carried out successfully, the plan will completely change the traffic conditions in the city.
A．carried
B．is carried
C．having been carried
D．to carry

Your Math instructor would have been happy to give you a make-up examination, had you gone and explained that your parents were ill at the time.
A．如果你向你的数学老师解释你父母那时生病了，他会乐于给你一次补考机会的。
B．只要你向你的数学老师解释了你父母那时生病的原因，他会乐于给你一次补考机会的。
C．你的数学老师听到你父母那时生病的情况后，他会乐于给你一次补课的机会。
D．你的数学老师会高兴你把你父母那时生病的情况告诉他，他会给你一次补课的机会。

This air crash which was suspected to be plotted by international political terrorists led to the stop of the diplomatic relations between the two countries.
A．suspensory
B．sustenance
C．suspicion
D．suspension

We have been told that under no circumstances we can use the telephone in the office for personal affairs.
A．did we use
B．may we use
C．we may use
D．we could use

Damage from the mortgage crisis hurt lender Casita, which______big first quarter losses.
A．knew
B．posted
C．presented
D．displayed

Mr. Salt wants to create anti-cancer foods by ______.
A．copying tissues from wild plants that take up selenium naturally into crop plants
B．copying genes that causes the plants to take up selenium from the soil
C．moving selenium from the tissues of wild plants into crop plants
D．moving genes from wild plants that take up selenium naturally into crop plants