题目内容
（请给出正确答案）
A．careful
B．cautious
C．deserved
D．helpful
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更多“After making observations for …”相关的问题
A.when
B.since
C.that
D.what
We got to work and succeeded, after a good deal of ______, in making our butter.
A．trial and error
B．morning and night
C．bitterness and hard
D．failure and success
A．Y
B．N
C．NG
A.making observations
B.for a week
C.found
D.so
Children begin to communicate by making noises ______ they are able to speak a language.
A．before long
B．long before
C．long ago
D．long after
After the passage the author will talk about______.
A．the principles of designing lenses
B．techniques of making contact lenses
C．the design of photographic lenses
D．styles of lenses
After the first atomic bomb explosion, everybody agreed that ________.
A) it was wise to choose Alamogordo as the test site
B) man had entered the age of nuclear warfare
C) it was not wise to use such a powerful weapon
D) it was not possible to keep the technology of making atomic bombs secret
A) the principles of designing lenses
B) techniques of making contact lenses
C) the design of photographic lenses
D) styles of lenses
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