Oil prices have risen by 32 percent since the start of the year，______ a record US $ 57.65 a barrel on April 4.
A. reached B. reaching C. to reach D. to be reaching
_____was known to them all is that Bob had broken his promise____he would give them a rise.
A. As; which B. What; that C. It; that D. It; which
Please tell me how the accident _________ . I am still in the dark.
A. come to B. come by C. come across D. come about
Jack always sleeps late on Sundays. I am sure he _______ when we get home.
A. is still sleeping B. is to be sleeping
C. will still be sleeping D. will have been sleeping
The box ____ two meters by two meters and ____ a ton.
A. measures; is weighed B. is measured; is weighed
C. is measured; weighs D. measures; weighs
It never occurred to humans until the mid-1990s ______ some animals can be cloned.
A. where B. that C. when D. what
