Some people have the idea_____ you can cross Canada in less than five days.
A.what |
B.that |
C.which |
D.when |
Only after her mother came to help her for the first few months ______ to begin her project.
A.did she allow |
B.had she allowed |
C.was she allowed |
D.is she allowed |
Thanks to Dr Yuan’s research, the UN has more tools in the battle to rid the world _____ hunger.
A.of |
B.on |
C.off |
D.at |
______ is even more important is that the earth cooled down, water began to appear on its surface.
A.When |
B.That |
C.Which |
D.What |
Jane _____ these families of chimps for many years and helped people understand how much they behave like humans.
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A.had studied |
B.studied |
C.studies |
D.has studied |
It is so wet there _____ the trees are extremely tall, some measuring over 90 meters.
A.what |
B.which |
C.that |
D.why |