Solar panels are strong enough to________ heavy highway traffic without breaking or making the roads more slippery.
A. put up with
B. hold on to
C. stand up to
D. stick up to
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The researchers set out six camera traps________ images of lions, and they identified lion tracks.
A. collecting
B. discovering
C. recognizing
D. capturing
Local people had reported seeing lions in the area, but no one presented convincing______.
A. evidence
B. information
C. knowledge
D. material
Some people _______why countries spend millions of dollars on space projects.
A. suspect
B. wonder
C. doubt
D. presume
In early space programs, _______the Apollo missions of the 1960s and 1970s, scientists developed objects for the astronauts to use on the moon.
A. as such
B. as for
C. such as
D. just as