My English teacher ______ my test.
A. has not yet graded
B. has not yet been graded
C. is not yet to be graded
D. is not yet graded
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We ______ on it for many hours, but we have not yet reached any conclusion.
A. are being worked
B. are working
C. have been working
D. have been worked
Shanghai ______ on the Huangpu River.
A. stand
B. stands
C. is being stand
D. has stood
“Tell the students to stop shouting. We ______ our essays now.”
A. write
B. have been writing
C. are writing
D. have written
“______ your best? It’s not satisfactory. I’m afraid you will have to do it again.”
A. Do you try
B. Have you tried
C. Are you trying
D. Have you been trying