问题描述：
1.Water will continue to be ____ it is today----next to oxygen in importance.
A.how B.as
ANSWER:A
2.--My foot hurts terribly ,doctor.
--Well,I wonder ____ it has been like this.
A.since when B.since then
ANSWER:B
A.how B.as
ANSWER:A
2.--My foot hurts terribly ,doctor.
--Well,I wonder ____ it has been like this.
A.since when B.since then
ANSWER:B
问题解答：
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