Now the problem of energy is becoming critical.It _____ an immediate solution.
Now the problem of energy is becoming critical.It _____ an immediate solution.
a、calls on
b、calls up
c、calls at
d、calls for
a、calls on
b、calls up
c、calls at
d、calls for
英語人氣：964 ℃時(shí)間：2020-06-16 08:10:00
優(yōu)質(zhì)解答
d
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