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Take all 3 MCQs in interactive quiz mode with timer and progress tracking
Professional American football player Fred Cox invented one of the world's most popular toys. In the 1970s, he came up with the idea for the Nerf football, which ________ of the harder and heavier regulation football.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Medium
A:
were a smaller, foam version
B:
are smaller, foam versions
C:
were smaller, foam versions
D:
is a smaller, foam version
Formed in 1967 to foster political and economic stability within the Asia-Pacific region, the Association of Southeast Asian Nations was originally made up of five members: Thailand, the Philippines, Singapore, Malaysia, and Indonesia. By the end of the 1990s, the organization ________ its initial membership.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A:
has doubled
B:
had doubled
C:
doubles
D:
will double
Atoms in a synchrotron, a type of circular particle accelerator, travel faster and faster until they ________ a desired energy level, at which point they are diverted to collide with a target, smashing the atoms.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A:
will reach
B:
reach
C:
had reached
D:
are reaching
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