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检测·课时达标l 知能达标演练
Ⅰ.单项填空
1.(2012·郑州高一检测)—Flight 221 ______．I’d better be on my way.Goodbye！
—Bye.Happy landing！
A.was announced B.is being announced
C.has announced D.is announced
2.—Have you handed in your paper yet?
—Yes,I have.I guess it ______ by my tutor now.
A.has graded B.is graded
C.is being graded D.is grading
3.Now new technology ______ to clear the polluted river.
A.is under use B.is in use
C.has used D.have used
4.—Where is your computer？
