题目内容

A．hasB．hadC．has hadD．had had

A. has
B. had
C. has had
D. had had

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A．spaceB．phoneC．serviceD．facility

A. space
B. phone
C. service
D. facility

A．expressedB．exposedC．discoveredD．found

A. expressed
B. exposed
C. discovered
D. found

A．placeB．locationC．spotD．context

A. place
B. location
C. spot
D. context

A．onB．byC．viaD．from

A. on
B. by
C. via
D. from