Which of the following shows the right way of feeding air to a wind tunnel section
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Nancy isn’t here. It’s my mistake. I forgot all about________ her.
[A] telephoning
[B] to telephone
[C] to telephone to
[D] the telephone to
They are going downtown ________ bus instead of ________ their bikes.
[A] by, by
[B] on; by
[C] by; in
[D] by; on
[A] in
[B] with
[C] within
[D] below
“This fact” in paragraph 4 of the text refers to ________.
[A] the wing are not good enough
[B] it costs a lot to test a plane
[C] some problems are found with the plane
[D] many people will die in a plane accident