Practice Quiz Mode
Take all 5 MCQs in interactive quiz mode with timer and progress tracking
Public-awareness campaigns about the need to reduce single-use plastics can be successful, says researcher Kim Borg of Monash University in Australia, when these campaigns give consumers a choice: for example, Japan achieved a 40 percent reduction in plastic-bag use after cashiers were instructed to ask customers whether ________ wanted a bag.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A:
they
B:
one
C:
you
D:
it
When external forces are applied to common glass made from silicates, energy builds up around minuscule defects in the material, resulting in fractures. Recently, engineer Erkka Frankberg of Tampere University in Finland used the chemical ________ to make a glassy solid that can withstand higher strain than silicate glass can before fracturing.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Hard
A:
compound, aluminum oxide
B:
compound aluminum oxide,
C:
compound, aluminum oxide,
D:
compound aluminum oxide
Midway through her 1968 jazz album A Monastic Trio, Alice Coltrane switches instruments, swapping the piano for the harp. With the same fluid style that Coltrane was famous for on piano, she ________ her fingers across the harp strings and creates a radiant sound.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Easy
A:
sweep
B:
are sweeping
C:
were sweeping
D:
sweeps
In 2018, a team of researchers led by Dr. Caitlin Whalen compiled every available measurement of ocean mixing rates from the past two decades. With this novel data set, the team was able to determine how current-driven mixing varies across ________ and what impact it has on the distribution of heat and nutrients in the ocean.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Hard
A:
regions,
B:
regions:
C:
regions;
D:
regions
Researcher Lin Zhi developed a process for increasing the tensile strength--measured in gigapascals, or GPa--of silkworm ________ dissolving and reweaving the silk in a solution of iron metal ions, zinc, and sugar, Zhi increased the amount of force required to stretch it from approximately 0.5 GPa to 2 GPa.
Which choice completes the text so that it conforms to the conventions of Standard English?
Difficulty: Hard
A:
silk, by
B:
silk by
C:
silk and by
D:
silk. By
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