题目内容

We were told that we should we should follow the main road we reached the central railway station.

A. whenever
B. until
C. while
D. wherever

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The children ran away from the orchard( 果园 ) they saw the guard.

A. the moment
B. after
C. before
D. as

No sooner had I arrived home it began to rain.

A. when
B. while
C. as
D. than

Several weeks had gone by I realized the painting was missing.

A. as
B. before
C. since
D. when

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

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