Had I known about this computer program, a huge amount of time and energy .
A．would have been saved B．had been saved
C．will be saved D．was saved
House owners keep their gardens in a neat and orderly state according to the regulations.
A．may B．would C．can D．shall
The traffic rule says young children under the age of four and ____ less than 40 pounds must be in a child safety seat.
A．being weighed B．to weigh C．weighed D．weighing
some people regard as a drawback is seen as a plus by many others.
A．Whether B．What C．That D．How
Tell me _______how it came about that you were 20 minutes late for class. You needn’t go into details.
A．in advance B．in brief C．in total D．in vain
Would you please put the dictionary it belongs?
A．where B．to which C．to whom D．what
