Hardly ______ the people ran toward it.
A. the plane has landed when
B. had the plane landed when
C. the plane had landed then
D. had the plane landed than
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According to the passage, bats and adult owls cannot see colours ______ .
A. because they hunt at night
B. because they cannot see light
C. because they have no cones and rods
D. because they have no cones
It is reported that a(n) ______ of accidents has occurred at that intersection.
A. series
B. lot
C. number
D. amount
"Some" in the last sentence of the first paragraph refers to ______ .
A. some cocoa trees
B. some chocolate drinks
C. some shops
D. some South American Indians
Those factories use (both) chemical (or) mechanical (methods) (to manufacture) clear glue.
A. both
B. or
C. methods
D. to manufacture