Several weeks had gone by I realized the painting was missing.
A. as
B. before
C. since
D. when
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It long before we the result of the experiment.
A. will not be; will know
B. is; will know
C. will not be; know
D. is; know
got into the roomthe telephone rang.
A. He hardly had; then
B. Hardly had he; when
C. He had not; then
D. Not had he; when
-Did you remember to give give Mary the money you owed her?-Yes, I gave it to her I saw her.
A. while
B. the moment
C. suddenly
D. once
The moment the 28th Olypic Games open, the whole world cheered.
A. declared
B. have been declared
C. have declared
D. were declared
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